Spontaneous cycloidal order mediating a spin-reorientation transition in a polar metal
Spontaneous cycloidal order mediating a spin-reorientation transition in a polar metal
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DOI：
10.1103/physrevb.102.180410
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发表时间：
2020-11-25
影响因子：
3.7
通讯作者：
McMorrow, D. F.
中科院分区：
文献类型：
--
作者：
Dashwood, C. D.;Veiga, L. S., I;McMorrow, D. F.
我们展示了当磁性相互作用在具有极性晶格扭曲的金属中竞争时，如何自发地出现复杂的调制顺序。结合中子和共振x射线散射和对称性分析，我们发现Ca3Ru2O7中的自旋重定向是由磁摆线介导的，其偏心率随温度的变化平稳而迅速。我们发现摆线对磁场高度敏感，磁场似乎不断产生高谐波调制。我们的结果提供了这种相关的多波段极性金属的丰富磁相的统一图像。
We show how complex modulated order can spontaneously emerge when magnetic interactions compete in a metal with polar lattice distortions. Combining neutron and resonant x-ray scattering with symmetry analysis, we reveal that the spin reorientation in Ca3Ru2O7 is mediated by a magnetic cycloid whose eccentricity evolves smoothly but rapidly with temperature. We find the cycloid to be highly sensitive to magnetic fields, which appear to continuously generate higher harmonic modulations. Our results provide a unified picture of the rich magnetic phases of this correlated, multiband polar metal.