Cylindrical magnetization model for glass-coated microwires with circular anisotropy: Statics |
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| Authors: | J Torrejón A Thiaville AL Adenot-Engelvin M Vázquez O Acher |
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| Institution: | 1. Instituto de Ciencias de Materiales de Madrid, CSIC, 28049 Madrid, Spain;2. Laboratoire de Physique des Solides, Université Paris-sud, CNRS, UMR 8502, 91405 Orsay Cedex, France;3. CEA Le Ripault, BP 16, 37260 Monts, France;1. Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1111 Budapest, M?egyetem rkp. 3, Hungary;2. MTA–BME Research Group for Composite Science and Technology, H-1111 Budapest, M?egyetem rkp. 3, Hungary;1. Dpto. Fisica de Materiales, Fac. Quimicas, UPV/EHU, 20009 San Sebastian, Spain;2. IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain;3. Faculty of Physics, Moscow State University, Leninskie Gory, 119991 Moscow, Russia;4. Immanuel Kant Baltic Federal University, 236041 Kaliningrad, Russia;5. Center of Physics of Materials, CSIC-UPV/EHU, P. Manuel de Lardizabal, 5, 20018 San Sebastian, Spain;6. Amirkhanov Institute of Physics of Daghestan Scientific Center, RAS, 367003 Makhachkala, Russia;7. Inst. Phys., Fac. Sci., UPJS, Park Angelinum 9, Kosice, Slovakia;8. Insitute of Solid State Physics, Chernogolovka, 142432 Moscow, Russia;1. Dpto. Fisica de Materiales, Basque Country University UPV/EHU, San Sebastian, Spain;2. Dpto de Física, Universidad de Oviedo, Oviedo 33007, Spain;3. Dpto. Fisica Aplicada, EUPDS, Basque Country University UPV/EHU, San Sebastian, Spain;4. IKERBASQUE, Basque Foundation for Science, Bilbao 48011, Spain |
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| Abstract: | The static magnetization profile of glass-coated microwires with effective circular anisotropy is investigated using micromagnetics. In this family of microwires, the ferromagnetic nucleus with an amorphous character presents a magnetic structure composed of an inner region with axial domains and an outer region with circular domains, due to magnetoelastic anisotropy. A one-dimensional micromagnetic model is developed, taking into account both the exchange and magnetoelastic anisotropy energies, and solved quasi analytically. The total energy, magnetization profiles and magnetization curves are investigated as a function of radius and anisotropy constant of the nucleus. This work represents a fundamental study of the magnetization process in these amorphous microwires and provides guidelines for the production of microwires with tailored magnetic properties. En passant, the nucleation problem in an infinite cylinder, introduced by W.F. Brown, is revisited. |
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