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Title: Constituents of magnetic anisotropy and a screening of spin-orbit coupling in solids

Using quantum mechanical perturbation theory (PT) we analyze how the energy of perturbation of different orders is renormalized in solids. We test the validity of PT analysis by considering a specific case of spin-orbit coupling as a perturbation. We further compare the relativistic energy and the magnetic anisotropy from the PT approach with direct density functional calculations in FePt, CoPt, FePd, MnAl, MnGa, FeNi, and tetragonally strained FeCo. In addition using decomposition of anisotropy into contributions from individual sites and different spin components we explain the microscopic origin of high anisotropy in FePt and CoPt magnets.
Authors:
 [1] ;  [1] ;  [2]
  1. Ames Laboratory
  2. Lawrence Livermore National Laboratory
Publication Date:
OSTI Identifier:
1139996
Report Number(s):
IS-J 8286
DOE Contract Number:
DE-AC02-07CH11358
Resource Type:
Conference
Resource Relation:
Conference: 58th Annual Magnetism and Magnetic Materials (MMM) Conference
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE