Giant Spin-Driven Ferroelectric Polarization in at Room Temperature
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
Although BiFeO3 is the most extensively investigated multiferroic material, its magnetoelectic couplings are barely understood. Here we report a thorough study of the magentoelectric (ME) couplings in spin-cycloidal buk BiFeO3 using first-principles calculations and microscopic spin-wave models compared with neutron-scattering measurements. We find that huge exchange-striction (ES) polarizations, i.e. the electric response of the magnetic exchange through ferroelectric and antiferrodistortive distortions, is giant enough to dominate over all other ME couplings. We show that BiFeO3 has a hidden record-high spin-driven polarization ( 3 C/cm2) at room-temperature. The huge ES polarizations can be tuned by coupling to the antiferrodistortive rotations.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)z; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1286779
- Alternate ID(s):
- OSTI ID: 1225763
- Journal Information:
- Physical Review Letters, Vol. 115, Issue 20; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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journal | May 2018 |
Investigation of new magnetoelastic and magnetic transitions accompanied with magnetoelectric coupling in $\boldsymbol {{\rm 0.1BiFeO_{3}{{\rm \mbox{--}}}0.9Sr(Fe_{0.5}Nb_{0.5})O_{3}}}$ multiferroic
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journal | December 2019 |
Size-dependent bistability in multiferroic nanoparticles
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journal | August 2019 |
Low-energy spin dynamics of orthoferrites AFeO$_3$ (A = Y, La, Bi) | text | January 2017 |
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