多铁性 BiFeO3 中的磁性弥散和各向异性。
magnetic dispersion and anisotropy in multiferroic BiFeO3.
机构信息
Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
出版信息
Phys Rev Lett. 2012 Aug 10;109(6):067205. doi: 10.1103/PhysRevLett.109.067205. Epub 2012 Aug 8.
Abstract
We have determined the full magnetic dispersion relations of multiferroic BiFeO3. In particular, two excitation gaps originating from magnetic anisotropies have been clearly observed. The direct observation of the gaps enables us to accurately determine the Dzyaloshinskii-Moriya (DM) interaction and the single ion anisotropy. The DM interaction supports a sizable magnetoelectric coupling in this compound.
摘要
我们已经确定了多铁性 BiFeO3 的完整磁色散关系。特别是，我们清楚地观察到了两个源于磁各向异性的激发能隙。能隙的直接观察使我们能够准确地确定 Dzyaloshinskii-Moriya（DM）相互作用和单离子各向异性。DM 相互作用在该化合物中支持相当大的磁电耦合。
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