Ab initio description of domain walls in Permalloy: Energy of formation and resistivities

作     者：S. Gallego P. Weinberger L. Szunyogh P. M. Levy C. Sommers 

作者机构：Center for Computational Materials Science Technical University of Vienna Gumpendorferstrasse 1a A-1060 Vienna Austria Instituto de Ciencia de Materiales de Madrid Consejo Superior de Investigaciones Científicas Cantoblanco 28049 Madrid Spain Department of Theoretical Physics and Center for Applied Mathematics and Computational Physics Budapest University of Technology and Economics Budafoki út 8. H-1521 Budapest Hungary Department of Physics New York University 4 Washington Place New York New York 10003 USA Laboratoire de Physique des Solides Université de Paris-Sud 91405 Orsay Cedex France 

出 版 物：《Physical Review B》 (物理学评论B辑：凝聚态物质与材料物理学)

年 卷 期：2003年第68卷第5期

页      面：054406-054406页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：.energy of formation New York formation energy single domain domain wall Anisotropic magnetoresistance description of domain walls in Permalloy Levy and Sommers 

摘      要：To determine the formation energy and resistivity for domain walls in permalloy (fcc-Ni85Fe15) we use the fully relativistic spin-polarized screened Korringa-Kohn-Rostoker method for layered systems and the corresponding Kubo-Greenwood equation in the context of the (inhomogeneous) coherent potential approximation. We find that the difference in formation energy between 90° and 180° domains becomes very small if the domain wall width increases. Furthermore, we show that regardless of the configuration within a domain wall the in-plane components of the resistivity are larger than in a single domain and, in particular, that the anisotropic magnetoresistance ratio within the domain wall vanishes.