Spin-Chirality-Driven Ferroelectricity on a Perfect Triangular Lattice Antiferromagnet
- Univ. of Tokyo (Japan)
- Yokohama National University, Yokohama (Japan)
- Japan Atomic Energy Agency (JAEA), Tokai (Japan)
- Univ. of Tokyo (Japan); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Magnetic field (B) variation of the electrical polarization Pc ( ∥c) of the perfect triangular lattice antiferromagnet RbFe(MoO4)2 is examined up to the saturation point of the magnetization for B⊥c. Pc is observed only in phases for which chirality is predicted in the in-plane magnetic structures. No strong anomaly is observed in Pc at the field at which the spin modulation along the c axis, and hence the spin helicity, exhibits a discontinuity to the commensurate state. These results indicate that the ferroelectricity in this compound originates predominantly from the spin chirality, the explanation of which would require a new mechanism for magnetoferroelectricity. Lastly, the obtained field-temperature phase diagrams of ferroelectricity well agree with those theoretically predicted for the spin chirality of a Heisenberg spin triangular lattice antiferromagnet.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1163166
- Journal Information:
- Physical Review Letters, Vol. 113, Issue 14; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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Multiferroic materials and magnetoelectric physics: symmetry, entanglement, excitation, and topology
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journal | November 2015 |
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journal | January 2020 |
Helicity, anisotropies, and their competition in a multiferroic magnet: Insight from the phase diagram
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journal | July 2016 |
Experimental evidence of symmetry breaking in the multiferroic using sound velocity measurements
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journal | October 2017 |
Multiferroic materials and magnetoelectric physics: symmetry, entanglement, excitation, and topology | text | January 2015 |
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