Magnetic ground state and multiferroicity in BiMnO${}_3$

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 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 $B\sim 35$ Tesla, 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.

5 pages, 5 figures

References in corpus (5)

• Combining DFT and Many-Body Methods to Understand Correlated Materials
• Structural anomalies at the magnetic transition in centrosymmetric BiMnO${}_3$
• First-principle Wannier functions and effective lattice fermion models for narrow-band compounds
• Long-Range Magnetic Interactions Induced by the Lattice Distortions and the Origin of the E-type Antiferromagnetic Phase in the Undoped Orthorhombic Manganites
• Orbital Ordering and Magnetic Interactions in BiMnO${}_3$

Cited by in corpus (7)

• Electronic structure of BiMeO3 multiferroics and related oxides
• Magnetic-field control of the electric polarization in BiMnO3
• Spin-spiral inhomogeneity as the origin of ferroelectricity in orthorhombic manganites
• Self-consistent linear response for the spin-orbit interaction related properties
• Spin dependence of ferroelectric polarization in the double exchange model for manganites
• Defects of the Crystal Structure and Jahn-Teller distortion in BiMnO3
• Realistic Modeling of Complex Oxide Materials