Spin-chirality-driven ferroelectricity on a perfect triangular lattice antiferromagnet

Magnetic field (B) variation of the electrical polarization P(c) (∥c) of the perfect triangular lattice antiferromagnet RbFe(MoO(4))(2) is examined up to the saturation point of the magnetization for B⊥c. P(c) is observed only in phases for which chirality is predicted in the in-plane magnetic struc...

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Published in:Physical review letters 2014-10, Vol.113 (14), p.147202-147202, Article 147202
Main Authors: Mitamura, H, Watanuki, R, Kaneko, K, Onozaki, N, Amou, Y, Kittaka, S, Kobayashi, R, Shimura, Y, Yamamoto, I, Suzuki, K, Chi, S, Sakakibara, T
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Language:English
Subjects:
Antiferromagnetism
Chirality
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Discontinuity
Ferroelectricity
Helicity
Lattices
Modulation
Phase diagrams
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cited_by cdi_FETCH-LOGICAL-c485t-96f5a3d72929528ef5401af28c21e9f4ee4d735b45fc291a1df1daf2e25b987e3
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container_issue 14
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container_title Physical review letters
container_volume 113
creator Mitamura, H
Watanuki, R
Kaneko, K
Onozaki, N
Amou, Y
Kittaka, S
Kobayashi, R
Shimura, Y
Yamamoto, I
Suzuki, K
Chi, S
Sakakibara, T
description Magnetic field (B) variation of the electrical polarization P(c) (∥c) of the perfect triangular lattice antiferromagnet RbFe(MoO(4))(2) is examined up to the saturation point of the magnetization for B⊥c. P(c) is observed only in phases for which chirality is predicted in the in-plane magnetic structures. No strong anomaly is observed in P(c) 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. The obtained field-temperature phase diagram of ferroelectricity agree well with those theoretically predicted for the spin chirality of a Heisenberg spin triangular lattice antiferromagnet.
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source American Physical Society:Jisc Collections:APS Read and Publish 2023-2025 (reading list)
subjects Antiferromagnetism
Chirality
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Discontinuity
Ferroelectricity
Helicity
Lattices
Modulation
Phase diagrams
title Spin-chirality-driven ferroelectricity on a perfect triangular lattice antiferromagnet
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