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

Journal Article · Wed May 07 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4865780· OSTI ID:22273812

Kota, Yohei; Imamura, Hiroshi ^[1]; Sasaki, Munetaka ^[2]

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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)

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.

• OSTI ID: 22273812
• Journal Information: Journal of Applied Physics, Vol. 115, 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); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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