Inversion symmetry breaking in noncollinear magnetic phase of a triangular lattice antiferromagnet CuFeO2

Details Inversion symmetry breaking in noncollinear magnetic phase of a triangular lattice antiferromagnet CuFeO2 Inversion symmetry breaking in noncollinear magnetic phase of a triangular lattice antiferromagnet CuFeO2

2005-10-26

arxiv.org/abs/cond-mat/0510701v1

Physics

Condensed Matter

Strongly Correlated Electrons

15 pages

Scientific paper

10.1103/PhysRevB.73.220401

Magnetoelectric and magnetoelastic phenomena correlated with a phase transition into noncollinear magnetic phase have been investigated for single crystals of CuFeO2 with a frustrated triangular lattice. CuFeO2 exhibits several long-wavelength magnetic structures related to the spin frustration, and it is found that finite electric polarization, namely inversion symmetry breaking, occurs with noncollinear but not at collinear magnetic phases. This result demonstrates that the noncollinear spin structure is a key role to induce electric polarization, and suggests that frustrated magnets which often favor noncollinear configurations can be plausible candidates for magnetoelectrics with strong magnetoelectric interaction.

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