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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2009, Volume 89, Issue 12, Pages 701–706
(Mi jetpl450)
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This article is cited in 16 scientific papers (total in 16 papers)
CONDENSED MATTER
Magnetic ground state and multiferroicity in BiMnO$_3$
I. V. Solov'evab, Z. V. Pchelkinaa a Institute of Metal Physics, Ural Division of the Russian Academy of Sciences
b Computational Materials Science Center, National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan
Abstract:
We argue that the centrosymmetric $C2/c$ symmetry in BiMnO$_3$ is spontaneously broken by antiferromagnetic (AFM) interactions existing in the system. The true symmetry is expected to be $Cc$, which is compatible with the noncollinear magnetic ground state, where the ferromagnetic order along one crystallographic axis coexists with the hidden AFM order and related to it ferroelectric polarization along two other axes. The $C2/c$ symmetry can be restored by the magnetic field $B\sim 35$ T, which switches off the ferroelectric polarization. Our analysis is based on the solution of the low-energy model constructed for the $3d$-bands of BiMnO$_3$, where all the parameters have been derived from the first-principles calculations. Test calculations for isostructural BiCrO$_3$ reveal an excellent agreement with experimental data.
Received: 02.04.2009
Citation:
I. V. Solov'ev, Z. V. Pchelkina, “Magnetic ground state and multiferroicity in BiMnO$_3$”, Pis'ma v Zh. Èksper. Teoret. Fiz., 89:12 (2009), 701–706; JETP Letters, 89:12 (2009), 597–602
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https://www.mathnet.ru/eng/jetpl450 https://www.mathnet.ru/eng/jetpl/v89/i12/p701
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Abstract page: | 226 | Full-text PDF : | 57 | References: | 34 |
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