Kimura K, Nakamura H, Kimura S, Hagiwara M, Kimura T
Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
Phys Rev Lett. 2009 Sep 4;103(10):107201. doi: 10.1103/PhysRevLett.103.107201. Epub 2009 Sep 1.
The effects of electric and magnetic fields on magnetic and electric properties have been investigated for a triangular lattice antiferromagnet CuCrO(2) showing magnetically induced ferroelectric order. We demonstrate that ferroelectric polarization reversal can be finely tuned by using both magnetic and electric fields in the triangular lattice antiferromagnet. The observed magnetoelectric tunability can be attributed to small in-plane spin anisotropy and a resultant high degree of freedom for the direction of ferroelectric polarization, which is characteristic of a multiferroic triangular lattice antiferromagnet with out-of-plane 120 degrees spin structure.
对于呈现磁致铁电有序的三角晶格反铁磁体CuCrO₂，研究了电场和磁场对其磁学和电学性质的影响。我们证明，在三角晶格反铁磁体中，通过同时使用磁场和电场，可以精细地调节铁电极化反转。观察到的磁电可调性可归因于面内小的自旋各向异性以及铁电极化方向由此产生的高度自由度，这是具有面外120度自旋结构的多铁性三角晶格反铁磁体的特征。
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