Electric-field switching of a magnetic propagation vector in a helimagnet

H. Murakawa; Yoshinori Onose; Y. Tokura

doi:10.1103/PhysRevLett.103.147201

Electric-field switching of a magnetic propagation vector in a helimagnet

H. Murakawa, Yoshinori Onose, Y. Tokura

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

27 Citations (Scopus)

Abstract

We report novel magnetoelectric properties of a quantum-spin helimagnet Ba2CuGe2O7 with a noncentrosymmetric (but nonpolar) crystal structure. It was found that the spin helicity of the cycloidal spin order is always fixed to the lattice, therefore the magnetic propagation vector k determines the sign of electric polarization in Ba2CuGe2O7. Consequently, not only the magnetic-field drive of the ferroelectric domain but also the electric-field switching of magnetic k vector can be achieved.

Original language	English
Article number	147201
Journal	Physical Review Letters
Volume	103
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.103.147201
Publication status	Published - 2009 Sept 29
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.103.147201

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abstract = "We report novel magnetoelectric properties of a quantum-spin helimagnet Ba2CuGe2O7 with a noncentrosymmetric (but nonpolar) crystal structure. It was found that the spin helicity of the cycloidal spin order is always fixed to the lattice, therefore the magnetic propagation vector k determines the sign of electric polarization in Ba2CuGe2O7. Consequently, not only the magnetic-field drive of the ferroelectric domain but also the electric-field switching of magnetic k vector can be achieved.",

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AB - We report novel magnetoelectric properties of a quantum-spin helimagnet Ba2CuGe2O7 with a noncentrosymmetric (but nonpolar) crystal structure. It was found that the spin helicity of the cycloidal spin order is always fixed to the lattice, therefore the magnetic propagation vector k determines the sign of electric polarization in Ba2CuGe2O7. Consequently, not only the magnetic-field drive of the ferroelectric domain but also the electric-field switching of magnetic k vector can be achieved.

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Electric-field switching of a magnetic propagation vector in a helimagnet

Abstract

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