ĐẠI HỌC QUỐC GIA HÀ NỘI TRƢỜNG ĐẠI HỌC CÔNG NGHỆ   Nguyễn Thị Minh Hồng CHẾ TẠO VÀ NGHIÊN CỨU MỘT SỐ TÍNH CHẤT ĐẶC TRƢNG CỦA TỔ HỢP CẤU TRÚC MICRONANO TRÊN NỀN VẬT LIỆU SẮT ĐIỆN LUẬN ÁN TIẾN SĨ VẬT LIỆU VÀ LINH KIỆN NANÔ Hà Nội - 2017 ĐẠI HỌC QUỐC GIA HÀ NỘI TRƢỜNG ĐẠI HỌC CÔNG NGHỆ  Nguyễn Thị Minh Hồng CHẾ TẠO VÀ NGHIÊN CỨU MỘT SỐ TÍNH CHẤT ĐẶC TRƢNG CỦA TỔ HỢP CẤU TRÚC MICRO-NANO TRÊN NỀN VẬT LIỆU SẮT ĐIỆN  Chuyên ngành: Vật liệu linh kiện nanơ Mã số: Chun ngành đào tạo thí điểm LUẬN ÁN TIẾN SĨ VẬT LIỆU VÀ LINH KIỆN NANÔ NGƢỜI HƢỚNG DẪN KHOA HỌC: PGS TS Phạm Đức Thắng GS TS Nguyễn Hữu Đức LỜI CAM ĐOAN Hà Nội - 2017 Tôi xin cam đoan cơng trình nghiên cứu tơi thực Các kết nghiên cứu trung thực, tài liệu tham khảo đƣợc trích dẫn đầy đủ LỜI CẢM ƠN Lời đầu tiên, cho phép bày tỏ tự hào lòng biết ơn sâu sắc tới hai ngƣời thầy đáng kính, PGS TS Phạm Đức Thắng GS TS Nguyễn Hữu Đức, ngƣời thầy với kinh nghiệm nghiên cứu khoa học, truyền cho nhiệt huyết, tận tình hƣớng dẫn giúp đỡ tơi thực thành công luận án Tôi muốn gửi lời cảm ơn chân thành đến thầy cô giáo đồng nghiệp Khoa Vật lý kỹ thuật Cơng nghệ nano, Phịng thí nghiệm trọng điểm Cơng nghệ micro nano, Trƣờng Đại học Công nghệ, ĐHQGHN quan tâm giúp đỡ, trao đổi kiến thức kinh nghiệm, tạo điều kiện thuận lợi cho thời gian học tập nghiên cứu Tôi chân thành cảm ơn GS TS Dong-Hyun Kim, GS TSKH Nguyễn Đình Đức, PGS TS Phan Thế Long hợp tác hỗ trợ thời gian thực luận án Đóng góp vào luận án cịn có giúp đỡ nhiệt tình hiệu đồng nghiệp Đặng Đình Long, Lê Việt Cƣờng, nghiên cứu sinh, học viên cao học Nguyễn Bá Đoàn, Nguyễn Huy Tiệp, Phạm Thái Hà, Nguyễn Duy Tâm, Phạm Thị Huyền, Phạm Hồng Công, Nguyễn Ngọc Trung, … - ngƣời khơng quản ngại khó khăn tơi thực triển khai ý tƣởng luận án Luận án đƣợc hoàn thành với hỗ trợ phần từ đề tài mã số 103.02-2015.80 Quỹ Phát triển Khoa học Công nghệ Quốc gia Những lời yêu thƣơng lòng biết ơn sâu sắc xin gửi tới bố, mẹ gia đình Chính tin tƣởng chăm lo mà gia đình dành cho động lực lớn giúp vững bƣớc Lời cuối lời cảm ơn chân thành yêu thƣơng nhất, em gửi tới anh Gia đình nguồn động viên tinh thần to lớn ấm áp giúp em vƣợt qua chặng đƣờng khó khăn suốt thời gian qua Nguyễn Thị Minh Hồng MỤC L ỤC MỞ ĐẦU CHƢƠNG I : TỔNG QUAN 1.1 Các hiệu ứng áp điện, từ giảo điện từ… …………………… 1.1.1 Hiệu ứng áp điện………………………………………… 1.1.2 Hiệu ứng từ giảo………………………………………… 1.1.3 Hiệu ứng điện từ………………………………………… 1.2 Vật liệu đa pha sắt……………………………………………… 1.2.1 Vật liệu đơn pha………………………………………… 1.2.2 Vật liệu tổ hợp…………………………………………… 1.3 Cơ chế điều khiển tính chất sắt……………………………………………………… 1.4 Khả ứng dụng c lưu trữ thôngtin…………………………………………………… Kết luận chương 1…………………………………………………… CHƢƠNG 2: CHẾ TẠO MẪU VÀ CÁC PHƢƠNG PHÁP KHẢO SÁT TÍNH CHẤT 2.1 hợp……………… Phương pháp chế 2.1.1 Vật liệu…………………………………… 2.1.2 Các phương pháp chế tạo……………… 2.2 Các phương pháp khảo sát cấu trúc tinh thể hình thái học 2.2.1 2.2.2 2.2.3 Xác định thành phần vật liệu …… ……………………… 2.3 Các phương pháp đo tính chất điện, từ………………………… 2.3.1 2.3.2 2.4 Phương pháp khảo sát thay đổi tính chất từ tác dụng điện thế……………………………………………………………… 2.4.1 Phương pháp đo………………………………………… 2.4.2 Khảo sát ảnh hưởng điện phương từ trường Kết luận chương 2…………………………………………………… CHƢƠNG 3: CÁC HỆ VẬT LIỆU ĐA PHA SẮT TỔ HỢP TRÊN PZT PHÂN CỰC DỌC 3.1 PZT/CoCr……………………………………………………… 3.2 PZT/NiFe/CoFe………………………………………………… 3.2.1 3.2.2 3.2.3 3.2.4 ……… Kết luận chương 3…………………………………………………… CHƢƠNG 4: HỆ VẬT LIỆU ĐA PHA SẮT TỔ HỢP PZT/NiFe/CoFe CHẾ TẠO TRÊN ĐẾ PZT PHÂN CỰC NGANG 4.1 Cấu trúc tinh thể, vi mô thành phần………………………… 4.2 Tính chất từ……………… 4.3 Ảnh hưởng điện đến tính chất từ ……………………… 4.3.1 Sự thay đổi từ độ tác dụng điện thế… …… 4.3.2 Quá trình đảo từ thế……………… 4.4 Ảnh hưởng phươ …………… 4.5 Ảnh hưởng chiều d …………… Kết luận chương 4…………………………………………………… CHƢƠNG 5: TÍNH TỐN LÝ THUYẾT 5.1 Ảnh hưởng điện trường đến tính chất từ vật liệu đa pha sắt tổ hợp …………………….……………………………………… Kết luận …………………………………………………… 5.2 Ảnh hưởng yếu tố dị hướng lên q trình định hướng mơmen từ vật liệu đa pha sắt tổ hợp ……………….…………… 1 1 1 5.2.1 Mơ hình…………………………………………………… 5.2.2 Kết quả…………………………………………………… Kết luận……………………………………………………………… KẾT LUẬN CHUNG TÀI LIỆU THAM KHẢO DANH MỤC CƠNG TRÌNH KHOA HỌC LIÊN QUAN magnetic switching in Co50Fe50 interdigitated electrodes on piezoelectric substrates”, Journal of Applied Physics 101, 054903 [52] H.F Tian, T.L Qu, L.B Luo, J.J Yang, S.M Guo, H Y Zhang, Y.G Zhao, and J.Q Li (2008), “Strain induced magnetoelectric coupling between magnetite and BaTiO 3”, Applied Physics Letters 92, 063507 [53] Hongguang Cheng and Ning Deng (2014), “An investigation into switching probability in electric field-induced precessional magnetization switching.”, Journal of Physics D: Applied Physics 47 205001 [54] H J A Molegraaf, J Hoffman, C A F Vaz, S Gariglio, D van der Marel, C H Ahn, and J.M Triscone, Magnetoelectric Effects in Complex Oxides with Competing Ground States (2009), Advanced Materials 21, 3470 [55] H Katsura, N Nagaosa, and A.V Balatsky (2005), “Spin Current and Magnetoelectric Effect in Noncollinear Magnets”, Physical Review Letters 95, 057205 [56] Hwaider Lin, Yuan Gao, Xinjun Wang, Tianxiang Nan, Ming Liu, Jing Lou, Guomin Yang, Ziyao Zhou, Xi Yang, Jing Wu, Ming Li, Zhongqiang Hu, Nian Xiang Sun (2016), “Integrated Magnetics and Multiferroics for Compact and Power-Efficient Sensing, Memory, Power, RF, and Microwave Electronics.”, IEEE Transactions on Magnetics 52 7, 1-8 [57] Haribabu Palneedi, Venkateswarlu Annapureddy, Shashank Priya, Jungho Ryu (2016), “Status and Perspectives of Multiferroic Magnetoelectric Composite Materials and Applications.”, Actuators 5:1, [58] Hans Schmid (1994), Ferroelectric 162, 317-338 [59] H Schmid, H Rieder, E Ascher (1965), “Magnetic susceptibilities of some 3d transition metal boracites”, Solid State Communications 327 [60] Hua Su, Xiaoli Tang, Huaiwu Zhang, Nian X Sun (2016), “Voltage-impulse-induced nonvolatile tunable magnetoelectric inductor based on multiferroic bilayer structure.”, Applied Physics Express 9:7, 077301 [61] H Wu, T Burnus, Z Hu, C Martin, A Maignan, J C Cezar, and A Tanaka, N B 130 Brookes, D I Khomskii, and L H Tjeng (2009), Physical Review Letters 102, 026404 [62] H Yang, Z.H Chi, J.L Jiang, W.J Feng, Z.E Cao, T Xian, C.Q Jin, R.C Yu (2008), “Centrosymmetric crystal structure of BiMnO3 studied by transmission electron microscopy and theoretical simulations”, Journal of Alloys and Compounds 461(1-2), 1-5 [63] H Zheng, J Wang, S E Lofland, Z Ma, L Mohaddes-Ardabili, T Zhao, L SalamancaRiba, S R Shinde, S B Ogale, F Bai, D Viehland, Y Jia, D G Schlom, M Wuttig, A Royburd, and R Ramesh (2004), “Multiferroic BaTiO3-CoFe2O4 Nanostructures”, Science 303, 661-663 [64] Ha Nguyen, N V Dang, Pei-Yu Chuang, L V Hong (2011), “Tetragonal and Hexagonal Polymorphs of BaTi1−xFexO3-Delta Multiferroics Using X-ray and Raman Analyses”, Applied Physics Letters 99, 20 [65] I A Sergienko, C Sen, and E Dagotto (2006), “Ferroelectricity in the Magnetic E-Phase of Orthorhombic Perovskites”, Physical Review Letters 97, 227204 [66] J C Slonczewski (1989), “Conductance and exchange coupling of two ferromagnets separated by a tunneling barrier”, Physical Review B 39, 6995 [67] J D Burton and E Y Tsymbal (2009), “Prediction of electrically induced magnetic reconstruction at the manganite/ferroelectric interface”, Physical Review B 80, 174406 [68] J Grajal, V Krozer, E Gonzalez, F Maldonado and J Gismero (2000), “Modeling and design aspects of millimeter-wave and submillimeter-wave Schottky diode varactor frequency multipliers”, IEEE Transactions on Microwave Theory 48(4), 700-711 [69] J H Park, J.-H Lee, M G Kim, Y K Jeong, M.-A Oak, H M Jang, H J Choi, and J F Scott (2010), “In-plane strain control of the magnetic remanence and cation-charge redistribution in CoFe2O4 thin film grown on a piezoelectric substrate”, Physical Review B 81, 134401 [70] J H Park, Y K Jeong, S Ryu, J Y Son, and H M Jang (2010), “Electric-field-control of magnetic remanence of NiFe2O4 thin film epitaxially grown on Pb(Mg1/3 Nb2/3)O3 PbTiO3”, Applied Physics Letter 96, 192504 [71] J.-H Kim, K.-S Ryu, J.-W Jeong, and S.-C Shin (2010), “Large converse magnetoelectric 131 coupling effect at room temperature in CoPd/PMN-PT (001) heterostructure”, Applied Physics Letters 97 252508 [72] J J Yang, Y G Zhao, H F Tian, L B Luo, H Y Zhang, Y J He, and H S Luo (2009), “Electric field manipulation of magnetization at room temperature in multiferroic CoFe2O4/Pb(Mg1/3Nb2/3)0.7Ti0.3O3CoFe2O4/Pb(Mg1/3Nb2/3)0.7Ti0.3O3 heterostruc tures”, Applied Physics Letters 94, 212504 [73] Jaffe, B., Cook, W R., and Jaffe, H (1971), Piezoelectric Ceramics, Academic Press, London [74] J Maxwell (1873), A Treatise on Electricity And Magnetism, Posner Memorial Collection, Carnegie Mellon University [75] Jia-Mian Hu, Zheng Li, Jing Wang, and C W Nan (2010), “Electric-field control of strainmediated magnetoelectric random access memory”, Journal of Applied Physics 107, 093912 [76] J.-M Hu, C W Nan, and L.-Q Chen (2011), “Size-dependent electric voltage controlled magnetic anisotropy in multiferroic heterostructures: Interface-charge and strain comediated magnetoelectric coupling”, Physical Review B 83, 134408 [77] J.-M Hu, Z Li, L-Q Chen, and C.-W Nan (2011), “High-density magnetoresistive random access memory operating at ultralow voltage at room temperature”, Nature Communications 2(553) [78] J M Hu, Z Li, L Q Chen, and C W Nan (2012), “Design of a Voltage-controlled Magnetic Random Access Memory Based on Anisotropic Magnetoresistance in a Single Magnetic Layer”, Advanced Materials 24, 2869-2873 [79] Jia-Mian Hu, Long-Qing Chen, Ce-Wen Nan (2016), “Multiferroic Heterostructures Integrating Ferroelectric and Magnetic Materials.”, Advanced Materials 28:1, 15-39 [80] J Ma, J Hu, Z Li, and C W Nan (2011), “Recent progress in multiferroic magnetoelectric composites: from bulk to thin films”, Advanced Materials 23, 1062-1087 [81] J Ryu, A.V Carazo, K Uchino and H.E Kim (2001), “Piezoelectric and Magnetoelectric properties of Zirconate Titanate/Ni-Ferrite particulate composites”, Journal of 132 Electroceramics 7, 17-24 [82] J Van Suchtelen (1972), “Product properties: a new application of composite materials.”, Philips Research Reports 27, 28-37 [83] J Wang et al (2003), “Epitaxial BiFeO3 multiferroic thin film heterostructures”, Science 299, 1719 - 1722 [84] J Wang, F.X Hu, R.W Li, J.R Sun, and B.G Shen (2010), “Strong tensile strain induced charge/orbital ordering in (001)-La7/8Sr1/8MnO3(001)-La7/8Sr1/8MnO3 thin film on 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3”, Applied Physics Letters 96, 052501 [85] J X Zhang et al., “Phase-field model for epitaxial ferroelectric and magnetic nanocomposite thin films” (2007), Applied Physics Letters 90, 052909 [86] J -Y Kim, L Yao, and S Van Dijken (2013), “Coherent piezoelectric strain transfer to thick epitaxial ferromagnetic films with large lattice mismatch.”, Journal of Physics: Condensed Matter 25, 082205 [87] J.V Suchlelen (1972), Philips Res Rep 27 28 [88] J Wang, J Hu, H Wang, H Jiang, Z Wu et (2010), “Electric-field modulation of magnetic properties of Fe films directly grown on BiScO3–PbTiO3BiScO3–PbTiO3 ceramics”, Applied Physics Letters 107, 083901 [89] J van den Boomgaard, A M J G van Run, and J van Suchtelen (1976), “Magnetoelectricity in piezoelectric-magnetostrictive composites” Ferroelectrics 10, 1, 295-298 [90] L.D Landau and E.M.Lisfshitz (1959), “Statistical Physics”, Addison-Wesley Publishing Co., Inc., Reading, Mass, [91] L.D Landau and E.M Lisfshitz (1960), Electrodynamics of Continuous Media, A Course of Theoretical Physics, Pergamon Press [92] L.D Landau and E.M Lifshitz, Electrodynamics of Continuous Media (1960), Oxford pergamon [93] Liu, M et al (2013), “Voltage tuning of ferromagnetic resonance with bistable magnetization switching in energy-efficient magnetoelectric composites.”, Advanced 133 Materials 25, 1435-1439 [94] M Ghidini, R Pellicelli, J.L Prieto, X Moya, J Soussi, J Briscoe, S Dunn & N.D Mathur (2013), “Non-volatile electrically driven repeatable magnetization reversal with no applied magnetic field.”, Nature Communications 4,1453 [95] Mirza Bichurin, Vladimir Petrov, Anatoly Zakharov, Denis Kovalenko, Su Chul Yang, Deepam Maurya, Vishwas Bedekar and Shashank Priya (2011), “Magnetoelectric Interactions in Lead-Based and Lead-Free Composites”, Materials 4, 651-702 [96] Mochizuki M and Seki S (2013), “Magnetoelectric resonances and predicted microwave diode effect of the skyrmion crystal in a multiferroic chiral-lattice magnet”, Physical Review B 87, 134403 [97] Nagaosa N and Tokura Y (2013), “Topological properties and dynamics of magnetic skyrmions”, Nature Nanotechnology 8, 899-911 [98] M Fiebig, T Lottermoser, D Frohlich, A V Goltsev, and R V Pisarev (2002), Observation of coupled magnetic and electric domains, Nature 419, 818 [99] M Fiebig (2005), “Revival of the magnetoelectric effect”, Journal of Physics D 38, R123 [100] M.I Bichurin, V.M.Petrov, G.Srinivasan (2002), “Theory of low - frequency magnetoelectric effects in ferromagnetic - ferroelectric layered composites”, Journal of Applied Physics 92(12), 7681 [101] M.I Bichurin, V.M Petrov (2003), “Theory of low - frequency magnetoelectric coupling in magnetostrictive - piezoelectric bilayers”, Physical Review B 68, 054402 [102] M Julliere (1975), “Tunneling between ferromagnetic films”, Physics Letters A 54, 225 [103] M.K F Wang, J.-M Liu, Z F Ren (2009),” Multiferroicity, The coupling between magnetic and polarization”, Advances in Physics 58(4), 321-448 [104] M K Lee, T.K Nath, C.B Eom, M.C Smoak and F Tsui (2000), “Strain modification of epitaxial perovskite oxide thin film using structural transitions of ferroelectric BaTiO3 134 substrate”, Applied Physics Letters 77, 3547-3549 [105] M Liu, O Obi, J Lou, Y Chen, Z Cai, S Stoute, M Espanol, M Lew, X Situ, K S Ziemer, V G Harris, and N X Sun (2009), “Giant electric field tuning of magnetic properties in multiferroic ferrite/ferroelectric heterostructures”, Advanced Functional Materials 19(11), 1826-1831 [106] M Liu, O Obi, J.Lou, Y Chen, Z Cai, S Stoute, M Espanol, M Lew, X Situ, K S Ziemer et al (2009), “Giant Electric Field Tuning of Magnetism in Novel Multiferroic FeGaB/Lead Zinc Niobate-Lead Titanate (PZN-PT) Heterostructures”, Advanced Mater 21(46), 4711 [107] M Liu, J Lou, S Li, and N.X Sun (2011), “E-Field Control of Exchange Bias and Deterministic Magnetization Switching in AFM/FM/FE Multiferroic Heterostructures”, Advanced Functional Materials 21(13), 2593-2598 [108] Magnetic Materials, Processes, and Devices (2007), S Krongleb, C Bonhote, S R Brankovic, Y Kitamoto, T Osaka, W Schwarzacher and G Zangari, The Electrochemical Society INC, N J., 3(25), 23 [109] M Liu, O Obi, J.Lou, S.Li, X Xing, G Yang, and N X Sun (2011), “Tunable magnetoresistance devices based on multiferroic heterostructures”, Journal of Applied Physics 109, 07D913 [110] M N Iliev, V G Hadjiev, M E Mendoza, J Pascual (2007), “Raman spectroscopy of multiferroic trigonal boracite Co3B7O13Cl.”, Physical Review B 76, 214112 [111] M Weisheit, S Fähler, A Marty, Y Souche, C Poinsignon, and D Givord (2007), “Electric field-induced modification of magnetism in thin-film ferromagnets.”, Science 315(5810), 349 [112] N V Dang, T L Phan, T D Thanh, L V Hong (2012), “Structural phase separation and optical and magnetic properties of BaTi1−xMnxO3 multiferroics”, Journal of Applied Physics 111, 11 [113] N Cai, C W Nan, J.Zhai and Y Lin, (2004), Applied Physics Letters 84, 3516-3519 [114] N Hur et al (2004), “Electric polarization reversal and memory in a multiferroic material 135 induced by magnetic fields”, Nature 429, 392-395 [115] N H Duc (2001), Handbook on the Physics and Chemistry of Rare-Earth, Elservier Science, North-Holland, Amsterdam 32(207), 453-513 [116] Nguyen Huu Duc (2015), “Aspects of Mangneto-Electrostrictive Materials and Applications”, Advandced Magnetism and Magnetic Materials 2, 145-157 [117] Nicolas Tiercelin, Yannick Dusch, Alexey Klimov, Stefano Giordano, Vladimir Preobrazhensky and Philippe Pernod (2011), “Room temperature magnetoelectric memory cell using stress-mediated magnetoelastic switching in nanostructured multilayers”, Applied Physics Letters 99, 192507 [118] Okumura K, Haruki K, Ishikura T, Hirose S and Kimura T (2013), “Multilevel magnetization switching by electric field in c-axis oriented polycrystalline Z-type hexaferrite”, Applied Physics Letters 103, 032906 Okamura Y, Kagawa F, Mochizuki M, Kubota M, Seki S, Ishiwata S, Kawasaki M, Onose Y and Tokura Y (2013), “Microwave magnetoelectric effect via skyrmion resonance modes in a helimagnetic multiferroic”, Nature Communications 4, 2391 [120] P Curie (1894), “On the symmetry of the physics phenomena, symmetry of and [119] electric and magnetic field”, Journal de Physique Archives 3, 393 [121] H Ohno, D Chiba, F Matsukura, T Omiya, E Abe, T Dietl, Y Ohno, K Ohtani (2000), “Electric-field control of ferromagnetism.”, Nature 408, 944-946 This was the first report of voltage-induced magnetization phase transitions in magnetic materials [122] P D Thang, D T Huong Giang, B C Tinh, T M Danh, N H Tuan, and N.H.Duc (2007), “Magnetoelastic properties of nanostructured ribbons FeCoSiB using for high-sensitive stress sensors”, Physica status solidi (c) 4, 4585-4588 [123] P.D Thang, G Rijnders, D.H.A Blank, N.H Duc, J.C.P Klaasse, E Brück (2008), “Multiferroic CoFe2O4-Pb(Zr,Ti)O3 nanostructures”, Journal of the Korean Physical Society 52 1406 [124] P Fischer, M Polomska, I Sosnowska, and M Szymanski (1980), Journal of Physical C 13, 1931 [125] R K Zheng, Y Wang, H L.W Chan, C.L Choy, and H.S Luo (2007), “Determination of the strain dependence of resistance in La0.7Sr0.3MnO3/PMN-PT using the converse 136 piezoelectric effect”, Physical Review B 75, 212102 [126] R K Zheng, Y Jiang, Y Wang, H.L.W Chan, C L Choy, and H.S Luo (2009), “Hydrodynamic relation in a two-dimensional Heisenberg antiferromagnet in a field”, Physical Review B 79, 174402 [127] R.M Hornreich (1969), “The magnetoelectric effect: Some likely candidates”, Solid State Communications 7, 1081-1085 [128] R M Bozorth (1993), Ferromagnetism IEEE Press., [129] G Radaelli, D Petti, E Plekhanov, I Fina, P Torelli, B R Salles, M Cantoni, C Rinaldi, D Gutiérrez, G Panaccione, M Varela, S Picozzi, J Fontcuberta, R Bertacco (2014), “Electric control of magnetism at the Fe/BaTiO3 interface.”, Nature Communications 5, 3404-3412 [130] W Ratcliff, Zahra Yamani, V Anbusathaiah, T R Gao, P A Kienzle, H Cao, and I Takeuchi (2013), “Electric-field-controlled antiferromagnetic domains in epitaxial BiFeO thin films probed by neutron diffraction.”, Physical Review B 87, 140405 [131] Ren-Ci Peng, Jia-Mian, HuKasra Momeni, Jian-Jun Wang, Long-Qing Chen, Ce-Wen Nan (2016), “Fast 180° magnetization switching in a strain-mediated multiferroic heterostructure driven by a voltage”, Scientific Reports 6, 27561 [132] S Brivio, D Petti, R Bertacco, and J.C Cezar (2011), “Electric field control of magnetic anisotropies and magnetic coercivity in Fe/BaTiO3(001)Fe/BaTiO=(001) heterostructures”, Applied Physics Letters 98, 092505 [133] S Dong, J Zhai, F Bai, J.-F Li and D Viehland, Push-pull mode magnetostrictive/piezoelectric laminate composite with an enhanced magnetoelectric voltage coefficient (2005), Applied Physics Letters 87, 062502 [134] Yoichi Shiota, Takayuki Nozaki, Frédéric Bonell, Shinichi Murakami, Teruya Shinjo, Yoshishige Suzuki (2012), “Induction of coherent magnetization switching in a few atomic layers of FeCo using voltage pulses.”, Nature Materials 11, 39-43 This was the first report of voltage-induced magnetization switching in a ferromagnetic metal [135] S Geprags, A Brandlmaier, M Opel, R Gross, and S.T.B Goennenwein (2010), “Electric 137 field controlled manipulation of the magnetization in Ni/BaTiO3 hybrid structures”, Applied Physics Letters 96, 142509 [136] S Picozzi, K Yamauchi, B Sanyal, I A Sergienko, and and E Dagotto (2007), “Dual Nature of Improper Ferroelectricity in a Magnetoelectric Multiferroic”, Physical Review Letters 99, 227201 [137] Sahoo S, Polisetty S, Duan C G, Jaswal S S, Tsymbal E Y and Bihler C (2007), “Ferroelectric control on magnetism in BaTiO3/Fe heterostructures via interface strain coupling”, Physical Review B 76, 092108 [138] S X Wang, N X Sun, M Yamaguchi and S Yabukami (2000), “Sandwich films: Properties of a new soft magnetic material”, Nature 407, 150-151 [139] S Zhang, Y G Zhao, P S Li, J J Yang, S Rizwan, J X Zhang, J Seidel, T L Qu, Y J Yang, Z L Luo, Q He, T Zou, Q P Chen, J.W Wang, L.F Yang, Y Sun, Y Z Wu, X Xiao, X F Jin, J Huang, C Gao, X F Han and R Ramesh (2012), “Electric-Field Control of Nonvolatile Magnetization inCo40Fe40B20/Pb(Mg1/3Nb2/3)0.7Ti0.3O3 Structure at Room Temperature”, Physical Review Letters 108, 137203 [140] Takahashi, Y., Yamasaki, Y & Tokura, Y Terahertz (2013), “Magnetoelectric resonance enhanced by mutual coupling of electromagnons”, Physical Review Letters 111, 037204 [141] T Brintlinger, S.-H Lim, K.H Baloch, P Alexander, Y Qi, J Barry, J Melngailis, L Salamanca-Riba, I Takeuchi, and J Cumings (2010), “In Situ Observation of Reversible Nanomagnetic Switching Induced by Electric Fields”, Nano Letters 10(4), 1219-1223 [142] T Cai, S Ju, J Lee, N Sai, A A Demkov, Q Niu, Z Li, J Shi, and E Wang (2009), “Magnetoelectric coupling and electric control of magnetization in ferromagnet/ferroelectric/normal-metal superlattices”, Physical Review B 80, 140415 [143] T Kimura et al (2003), “Magnetic control of ferroelectric polarization”, Nature 426, 5558 [144] T H O’Dell (1965), Electron Power 11, 266 [145] Tianxiang Nan, Ziyao Zhou, Jing Lou, Ming Liu, Xi Yang, Yuan Gao, Scott Rand and Nian 138 X Sun (2012), “Voltage impulse induced bistable magnetization switching in multiferroic heterostructures”, Applied Physics Letters 100, 132409 [146] Tianxiang Nan, Satoru Emori, Bin Peng, Xinjun Wang, Zhongqiang Hu, Li Xie, Yuan Gao, Hwaider Lin, Jie Jiao, Haosu Luo, David Budil, John G Jones, Brandon M Howe, Gail J Brown, Ming Liu, Nian Sun (2016), “Control of magnetic relaxation by electric-field-induced ferroelectric phase transition and inhomogeneous domain switching.”, Applied Physics Letters 108:1, 012406 [147] Taciano Perez, César A F De Rose (2010), “Non-Volatile Memory: Emerging Technologies and Their Impacts on Memory Systems”, Pontifícia Universidade Católica Rio (PUC-Rio), Technical report [148] T Taniyama, K Akasaka, D Fu, and M Itoh (2009), “Artificially controlled magnetic domain structures in ferromagnetic dots/ferroelectric heterostructures”, Journal of Applied Physics 105(7), 07D901 [149] T Wu, A Bur, K Wong, P Zhao, C.S Lynch, P.K Amiri, K L Wang, and G.P Carman (2011), “Electrical control of reversible and permanent magnetization reorientation for magnetoelectric memory devices”, Applied Physics Letters 98(26), 262504 [150] T Wu, A Bur, P Zhao, K P Mohanchandra, K Wong, K L Wang, C S Lynch, and G P Carman (2011), “Giant electric-field-induced reversible and permanent magnetization reorientation on magnetoelectric Ni/(011) [Pb(Mg1/3Nb2/3)O3](1−x)[PbTiO3]x[Pb(Mg1/3Nb2/3)O3](1−x)– [PbTiO3]x heterostructure”, Applied Physics Letters 98, 012504 [151] M Trassin, J D Clarkson, S R Bowden, Jian Liu, J T Heron, R J Paull, E Arenholz, D T Pierce, and J Unguris (2013), “Interfacial coupling in multiferroic/ferromagnet heterostructures.”, Physical Review B 87, 134426 [152] V Garcia, M Bibes, L Bocher, S Valencia, F Kronast, A Crassours, X Moya, S EnouzVedrenne, A Gloter, D Imhoff, C Deranlot, N D Mathur, S Fusil, K Bouzehouane, and A Bar thélémy (2010), “Ferroelectric control of spin polarization”, Science 327, 1106 [153] V Laukhin, V Skumryev, X Martí, D Hrabovsky, F Sánschez, M V García-Cuenca, C 139 Ferrater, M Varela, U Lders, J F Bobo, and J Fontcuberta (2006), “Electric Field Control of Exchange Bias in Multiferroic Epitaxial Heterostructures”, Physical Review Letters 97 227201 [154] V M Petrov, G Srinivasan, M I Bichurin, T A Galkina (2009), “Theory of magnetoelectric effect for bending modes in magnetostrictive-piezoelectric bilayers”, Journal of Applied Physics 105, 063911 [155] V Skumryev, V Laukhin, I Fina, X Martis, F Sánschez, M Gospodinov and J Fontcuberta (2011), “Magnetization reversal by electric-field decoupling of magnetic and ferroelectric domain walls in multiferroics-based heterostructures”, Physical Review Letters 106, 057206 [156] W Eerenstein, N.D Mathur, and J.F.Scott (2006), “Multiferroic and magnetoelectric materials”, Nature 442, 760-761 [157] W Eerenstein, M Wtora, J L Prieto, J.F.Scott, and N.D Mathur (2007), “Giant sharp and persistent converse magnetoelectric effects in multiferroic epitaxial heterostructures”, Nature Materials 6, 348-351 [158] W H Wang, H Sukegawa, R Shan, S Mitani, and K Inomata (2009), “Giant tunneling magnetoresistance up to 330% at room temperature in sputter deposited Co2FeAl/MgO/CoFeCo2FeAl/MgO/CoFe magnetic tunnel junctions”, Applied Physics Letters 95, 182502 [159] X Y Lu, B Wang, Y Zheng, E Ryba (2007), “Coupling interaction in 1-3-type multiferroic composite thin films”, Applied Physics Letters 90, 133124 [160] Xue, X., Zhou, Z., Peng, B., Zhu, M., Zhang, Y., Ren,W., Ren, T., Yang, X., Nan, T., Sun, o N.X., et al (2015), “Electric field induced reversible 180 magnetization switching through tuning of interfacial exchange bias along magnetic easy-axis in multiferroic laminates.”, Scientific Reports., 5, 16480 [161] X Yang, Z Zhou, T Nan, Y Gao, G M Yang, M Liu, N X Sun (2016), “Recent advances in multiferroic oxide heterostructures and devices.”, Journal of Mater Chemistry C 4:2, 234-243 140 [162] Gollapudi Sreenivasulu, Peng Qu, Vladimir Petrov, Hongwei Qu, Gopalan Srinivasan (2016), “Sensitivity Enhancement in Magnetic Sensors Based on Ferroelectric-Bimorphs and Multiferroic Composites.”, Sensors 16:2, 262 [163] Y Gao, X Wang, L Xie, Z Hu, H Lin, Z Zhou, T Nan, X Yang, B M Howe, J G Jones, G J Brown, N X Sun (2016), “Giant electric field control of magnetism and narrow ferromagnetic resonance linewidth in FeCoSiB/Si/SiO2/PMN-PT multiferroic heterostructures.” Applied Physics Letters 108:23, 232903 [164] Y H Chu, L.W Martin, M.B Holcomb, M Gajek, S.-J Han, Q He, N Balke, C.-H Yang, D.Lee, W Hu, Q Zhan, P.-L Yang, A Fraile-Rodriguez, A Scholl, S.X Wang, and R Ramesh (2008), “Electric-field control of local ferromagnetism using a magnetoelectric multiferroic.”, Nature Materials 7, 478 [165] Y J Choi, H T Yi, S Lee, Q Huang, V Kiryukhin, and S.-W Cheong (2008), Physical Review Letters 100, 047601 [166] Yan Liu, Yonggang Zhao, Peisen Li, Sen Zhang, Dalai Li, Hao Wu, Aitian Chen, Yang Xu, X F Han, Shiyan Li, Di Lin, Haosu Luo (2016), “Electric-Field Control of Magnetism in Co40Fe40B20/(1-x)Pb(Mg1/3Nb2/3)O3 -xPbTiO3 Multiferroic Heterostructures with Different Ferroelectric Phases.”, ACS Applied Materials & Interfaces 8:6, 3784-3791 [167] Y Shirahata, T.Nozaki, G Venkataiah, H Taniguchi, M Itoh, and T Taniyama (2011), “Switching of the symmetry of magnetic anisotropy in Fe/BaTiO heterostructures”, Applied Physics Letters 99(2), 022501 [168] Y Yang, Z L Luo, H Huang, Y Gao, J Bao, X G Li, S Zhang, Y G Zhao, X Chen, G Pan, and C Gao (2011), “Electric-field-control of resistance and magnetization switching in multiferroic Zn0.4Fe2.6O4/0.7Pb(Mg2/3Nb1/3)O3-0.3PbTiO3 epitaxial heterostructures”, Applied Physics Letter 98, 153509 [169] Y.Y Tomashpol’ski, Y.N Venevtsev, V.N Beznozdrev (1965), Fiz Tverd Tela 2763 [170] Yin, Y W et al (2013), “Enhanced tunnelling electroresistance effect due to a ferroelectrically induced phase transition at a magnetic complex oxide interface Nature Materials 12, 397-402 141 [171] Yoshinori Tokura, Shinichiro Seki and Naoto Nagaosa (2014), “Multiferroics of spin origin.”, Reports on Progress in Physics 77, 076501 [172] Zhongqiang Hu, Tianxiang Nan, Xinjun Wang, Margo Staruch, Yuan Gao, Peter Finkel, and Nian X Sun (2015), “Voltage control of magnetism in FeGaB/PIN-PMN-PT multiferroic heterostructures for high-power and high-temperature applications”, Applied Physics Letters 106, 022901 [173] Zheng H, Wang J, Lofland SE, Ma Z, Mohaddes-Ardabili L, Zhao T, Salamanca-Riba L, Shinde SR, Ogale SB, Bai F, Viehland D, Jia Y, Schlom DG, Wuttig M, Roytburd A, Ramesh R (2004), “Multiferroic BaTiO3-CoFe2O4 Nanostructures.”, Science, 303, 5658 [174] Zhongqiang Hu, Xinjun Wang, Tianxiang Nan, Ziyao Zhou, Beihai Ma, Xiaoqin Chen, John G Jones, Brandon M Wang, Rongdi Budil, Ming Liu, Nian Ferromagnetic Heterostructures.” Scientific Reports 6, 32408 [175] Ziyao Zhou, Morgan Trassin, Ya Gao, Yuan Gao, Diana Qiu, Khalid Ashraf, Tianxiang Nan, Xi Yang, S.R Bowden, D.T Pierce, M.D Stiles, J Unguris, Ming Liu, Brandon M Howe, Gail J Brown, S Salahuddin, R Ramesh & Nian X Sun (2014), “Probing electric field control of magnetism using ferromagnetic resonances.”, Nature Communications 6, 6082 142 DANH MỤC CƠNG TRÌNH KHOA HỌC LIÊN QUAN Tạp chí quốc tế [1] N.T.M Hong, P.D Thang, N.H Tiep, L.V Cuong and N.H Duc, 2011, “Voltage-controllable magnetic behavior in PZT/NiFe/CoFe nanocomposites”, Adv Nat Sci: Nanosci Nanotechnol 2, 015015 [2] N.T.M Hong, N.H Duc and P.D Thang, 2013, “Converse magnetoelectric effect in PZT/NiFe/CoFe nanocomposites”, Int Journal of Nanotechnology 10, 206 [3] N.T.M Hong, N.B Doan, N.H Tiep, L.V Cuong, B.N.Q Trinh, P.D Thang and D.-H Kim, 2013,“Switchable Voltage Control of the Magnetic Anisotropy in Heterostructured Nanocomposites of CoFe/NiFe/PZT”, Journal of the Korean Physical Society 63, 812 [4] N.T.M Hong, P.T Ha, L.V Cuong, P.T Long, P.D Thang, 2014, “Electrical field induced magnetization switching in CoFe/NiFe/PZT multiferroics”, IEEE Transactions on Magnetics 50, 2005204 Tạp chí nước [1] N.T.M Hong, P.D Thang, D.D Long, P.T Ha, N.N Trung, P.H Cong, N.D Duc, 2014, The temperature-sensitivity of a critical electric field induced magnetic easy-axis reorientation ferromagnetic/ferroelectric layered heterostructures, Communications in Physics 24, 71 [2] N.T.M Hong, P.T Ha, P.D Thang, 2014, Structure and magnetic properties of PZT/CoCr heterostructures, Communications in Physics 24, 99 Báo cáo Hội nghị [1] N.T.M Hong, P.T Ha, B.N.Q Trinh, P.H Cong, N.D Duc, D.D Long, P.D Thang, 2013, “Size dependent electric field control of strain mediated magnetoelectric random access memory”, Proceeding of The 4rd International Workshop on Nanotechnology and Application (IWNA), p.359 Danh mục gồm cơng trình 143 144 ... CHẾ TẠO VÀ NGHIÊN CỨU MỘT SỐ TÍNH CHẤT ĐẶC TRƢNG CỦA TỔ HỢP CẤU TRÚC MICRO- NANO TRÊN NỀN VẬT LIỆU SẮT ĐIỆN  Chuyên ngành: Vật liệu linh kiện nanô Mã số: Chuyên ngành đào tạo thí điểm LUẬN ÁN. .. chất vi cấu trúc, tính chất điện, từ nghiên cứu chế điều khiển từ độ điện trƣờng cấu trúc tổ hợp PZT/CoCr, PZT/NiFe/CoFe Nội dung nghiên cứu Luận án: - Nghiên cứu chế tạo số vật liệu đa pha sắt. .. Mục tiêu nghiên cứu Luận án: Mục tiêu luận án nghiên cứu chế tạo khảo sát tính chất số vật liệu đa pha sắt tổ hợp vật liệu PZT hợp kim 3d phƣơng pháp kết dính phún xạ, phù hợp với điều kiện công