Spin-lattice coupling in ferroelectric spiral magnets: Comparison between the cases of (Tb,Dy)MnO3 and CoCr2O4

Taka Hisa Arima; Yuichi Yamasaki; Takeshi Goto; Satoshi Iguchi; Kenya Ohgushi; Shigeki Miyasaka; Yoshinori Tokura

doi:10.1143/JPSJ.76.023602

Spin-lattice coupling in ferroelectric spiral magnets: Comparison between the cases of (Tb,Dy)MnO₃ and CoCr₂O₄

Taka Hisa Arima, Yuichi Yamasaki, Takeshi Goto, Satoshi Iguchi, Kenya Ohgushi, Shigeki Miyasaka, Yoshinori Tokura

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

Lattice modulation expected for various types of spiral magnetic ordering with a propagation vector Q_m is discussed in terms of the symmetric (S_i·S_j type) and antisymmetric (S_i x S_j type) exchange interactions between neighboring spins (S _i and S_j). We show that the conical ordering causes the superlattice modulation with Q_m via the antisymetric interaction, while the elliptical deformation of spiral induces a 2Q_m modulation in lattice, due to the symmetric and antisymmetric interactions. This theoretical prediction was experimentally confirmed for a transverse elliptical antiferromagnet (Tb,Dy)MnO₃ and a transverse conical ferrimagnet CoCr₂O₄, both accompanied by ferroelectricity (lattice deformation with Q = 0) as well.

Original language	English
Article number	023602
Journal	journal of the physical society of japan
Volume	76
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.76.023602
Publication status	Published - 2007 Feb
Externally published	Yes

Keywords

Conical magnet
Cycloid
Exchange striction
Multiferroics
Perovskite manganese oxide
Spinel cobalt oxide
Spiral magnet
Superlattice
Synchrotron x-ray diffraction

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.76.023602

Cite this

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title = "Spin-lattice coupling in ferroelectric spiral magnets: Comparison between the cases of (Tb,Dy)MnO3 and CoCr2O4",

abstract = "Lattice modulation expected for various types of spiral magnetic ordering with a propagation vector Qm is discussed in terms of the symmetric (Si·Sj type) and antisymmetric (Si x Sj type) exchange interactions between neighboring spins (S i and Sj). We show that the conical ordering causes the superlattice modulation with Qm via the antisymetric interaction, while the elliptical deformation of spiral induces a 2Qm modulation in lattice, due to the symmetric and antisymmetric interactions. This theoretical prediction was experimentally confirmed for a transverse elliptical antiferromagnet (Tb,Dy)MnO3 and a transverse conical ferrimagnet CoCr2O4, both accompanied by ferroelectricity (lattice deformation with Q = 0) as well.",

keywords = "Conical magnet, Cycloid, Exchange striction, Multiferroics, Perovskite manganese oxide, Spinel cobalt oxide, Spiral magnet, Superlattice, Synchrotron x-ray diffraction",

author = "Arima, {Taka Hisa} and Yuichi Yamasaki and Takeshi Goto and Satoshi Iguchi and Kenya Ohgushi and Shigeki Miyasaka and Yoshinori Tokura",

year = "2007",

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journal = "Journal of the Physical Society of Japan",

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T1 - Spin-lattice coupling in ferroelectric spiral magnets

T2 - Comparison between the cases of (Tb,Dy)MnO3 and CoCr2O4

AU - Arima, Taka Hisa

AU - Yamasaki, Yuichi

AU - Goto, Takeshi

AU - Iguchi, Satoshi

AU - Ohgushi, Kenya

AU - Miyasaka, Shigeki

AU - Tokura, Yoshinori

PY - 2007/2

Y1 - 2007/2

N2 - Lattice modulation expected for various types of spiral magnetic ordering with a propagation vector Qm is discussed in terms of the symmetric (Si·Sj type) and antisymmetric (Si x Sj type) exchange interactions between neighboring spins (S i and Sj). We show that the conical ordering causes the superlattice modulation with Qm via the antisymetric interaction, while the elliptical deformation of spiral induces a 2Qm modulation in lattice, due to the symmetric and antisymmetric interactions. This theoretical prediction was experimentally confirmed for a transverse elliptical antiferromagnet (Tb,Dy)MnO3 and a transverse conical ferrimagnet CoCr2O4, both accompanied by ferroelectricity (lattice deformation with Q = 0) as well.

AB - Lattice modulation expected for various types of spiral magnetic ordering with a propagation vector Qm is discussed in terms of the symmetric (Si·Sj type) and antisymmetric (Si x Sj type) exchange interactions between neighboring spins (S i and Sj). We show that the conical ordering causes the superlattice modulation with Qm via the antisymetric interaction, while the elliptical deformation of spiral induces a 2Qm modulation in lattice, due to the symmetric and antisymmetric interactions. This theoretical prediction was experimentally confirmed for a transverse elliptical antiferromagnet (Tb,Dy)MnO3 and a transverse conical ferrimagnet CoCr2O4, both accompanied by ferroelectricity (lattice deformation with Q = 0) as well.

KW - Conical magnet

KW - Cycloid

KW - Exchange striction

KW - Multiferroics

KW - Perovskite manganese oxide

KW - Spinel cobalt oxide

KW - Spiral magnet

KW - Superlattice

KW - Synchrotron x-ray diffraction

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