Double shifted magnetization curves in magnetic bilayers |
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| Institution: | 1. Department of Physics, National Taiwan University, Taipei, Taiwan;2. Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung, Taiwan;3. Department of Physics, National ChengKung University, Tainan, Taiwan;4. Department of Materials Science & Engineering, National Tsing Hua University, HsinChu, Taiwan;1. School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, People’s Republic of China;2. National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, People’s Republic of China;3. Department of Physics, Korea Advanced Institute of Science and Technology, 373-1 Guseongdong, Daejeon 305–701, Republic of Korea;4. College of Information and Communication Engineering, North University of China, Taiyuan 030051, People’s Republic of China;1. PME Department, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Delft, The Netherlands;2. Department of Industrial Design Engineering, Delft University of Technology, Delft, The Netherlands;3. Department of Aerospace Engineering, Amrita University, Coimbatore, India |
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| Abstract: | Ultrathin ferromagnetic biaxial films exhibit uniaxial anisotropy induced by underlayer and double shifted magnetization curves. Two possible origins of the double shifted curves are identified from experimental data, namely, the step-induced anisotropy and the exchange-coupled induced interfacial anisotropy. Micromagnetic study of modified astroids with starlike shapes indicates that a large uniaxial anisotropy induced by the interface plays a key role in the formation of double shifted magnetization waves. An additional bias field along the easy axis may enhance the shifted field. The present research status, both experimental and theoretical, is briefly discussed. |
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