First-principles Exploration of Ferromagnetic and Ferroelectric Double-perovskite Transition-metal Oxides
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Abstract
Possible ferromagnetic and ferroelectric phases are explored for bismuth transition-metal oxides with doubleperovskite structure A2BB0O6 on the basis of first-principles calculations within the local spin-density approximation (LSDA) and generalized gradient approximation (GGA). It is found that a lattice instability of the cubic to a non-centrosymmetric phase always happens in the all cases of lead and bismuth perovskite oxides with the 3d transition-metal ions at the B site. Placing bismuth ion at the A site in the double-perovskite structure, several sets of the 3d transition-metal ions are selected according to their total valence sum and the Goodenough-Kanamori rule for the superexchange coupling. Ferromagnetic solutions are actually obtained both within LSDA and GGA for Bi2CrFeO6, Bi2MnNiO6 and Bi2CrCuO6. For non-centrosymmetric monoclinic Bi2MnNiO6, the ferromagnetic and ferroelectric phase has the spin magnetic moment of 5μB and the electric polarization of 28μC/cm2.
Journal
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- Physica B : Condensed Matter
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Physica B : Condensed Matter 383 (1), 9-12, 2006-08-15
Elsevier
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Details 詳細情報について
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- CRID
- 1050859215941174912
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- NII Article ID
- 120000878121
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- NII Book ID
- AA10673546
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- CiNii Articles