Magnetostatic properties of heterogeneous Co-based amorphous/crystalline phases |
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| Affiliation: | 1. Department of Materials Engineering, Chungnam National University, Daeduk Science Town, Daejeon, 305-764, South Korea;2. Physical Faculty, Moscow State University, 119899, Moscow, Russia;1. Mechanical and Energy Engineering Department, Shahid Beheshti University, Tehran, Iran;2. Department of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran;1. College of Resources and Environment Engineering, Wuhan University of Technology, Wuhan 430070, China;2. Changsha Research Institute of Mining and Metallurgy Co., LTD., Changsha 410012, China;1. Departamento de Ciencias Básicas, Academia de Física, Escuela Superior de Ingeniería Química e Industrias Extractivas ESIQIE-IPN, Instituto Politécnico Nacional, Mexico City, Mexico;2. Division of Research in Medical Engineering, Instituto Nacional de Rehabilitación, Mexico;3. Center for Research and Advanced Studies of the National Polytechnic Institute, Mexico;4. Instituto Politécnico Nacional, Centro de Investigación en Computación, Laboratorio de Robótica y Mecatrónica, Mexico City, Mexico;5. Tecnológico de Monterrey, Unidad Guadalajara. Zapopan, Jalisco, Mexico;1. Université Paris Sud, Université Paris-Saclay, CIAMS, 91405 Orsay, France;2. CIAMS, Université d׳Orléans, 45067 Orléans, France |
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| Abstract: | Using the magneto-optical Kerr effect, magnetic hysteresis loops are measured on annealed amorphous Co66Fe4B15Si15 samples, to characterize the magnetostatic properties of the heterogeneous crystalline/amorphous phases. A gradual change, on microscale inhomogeneous, change of the magnetic properties with respect to thickness is revealed on HCP-Co, FCC-Co crystalline phases near the surface. The inner amorphous phase exhibits an irregular variation of the local magnetic properties, presumably due to the occurrence and distribution of microcrystallites. The effective field, exerted by the crystalline layer on the amorphous phase, is opposite to the surface magnetization, indicating that there is an antiferromagnetic coupling between surface and inner amorphous phases. |
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