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Title: Effect of lattice deformation on exchange coupling constants in Cr{sub 2}O{sub 3}

We studied lattice deformation effect on exchange interaction in the corundum-type Cr{sub 2}O{sub 3} theoretically. First-principles electronic structure calculations were performed to evaluate the total energy and exchange coupling constants of Cr{sub 2}O{sub 3} under lattice deformation. We found that a few percent elastic deformation is expected via misfit strain and that the first- and second-nearest neighbor exchange coupling constants of Cr{sub 2}O{sub 3} strongly depend on the lattice deformation. These results imply a possibility for improving the thermal stability of Cr{sub 2}O{sub 3} based magnetoelectric devices by lattice deformation.
Authors:
;  [1] ;  [2]
  1. National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568 (Japan)
  2. Department of Applied Physics, Tohoku University, Sendai 980-8579 (Japan)
Publication Date:
OSTI Identifier:
22273812
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CHROMIUM OXIDES; COUPLING CONSTANTS; CRYSTAL LATTICES; DEFORMATION; ELECTRICAL PROPERTIES; ELECTRONIC STRUCTURE; EXCHANGE INTERACTIONS; MAGNETIC PROPERTIES; PHASE STABILITY; STRAINS