Antiferroquadrupole order and magnetic field induced octupole in CeB6
Antiferroquadrupole order and magnetic field induced octupole in CeB6
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CeB6 中的反铁四极有序和磁场感应八极
DOI：
10.1103/physrevb.85.174417
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T. Matsumura
中科院分区：
文献类型：
--
作者：
M. Suzuki;I. S. Suzuki;T. Adachi and Y. Koike;K. Kumagai,;T. Matsumura
我们通过共振 X 射线衍射研究了 CeBin 磁场的反铁四极有序相。通过分析沿磁场方向反转时能谱的显着变化，我们推导出磁偶极子、电四极子和磁八极矩的反铁分量的场依赖性，这些矩在脑轨道中以传播矢量同时感应。数据处理基于理论计算的谱函数。对于其他场方向也得出场致八极子的存在的结论。我们还展示了磁场中线性组合型反铁四极有序参数形成的直接证据，该参数表示为并随场方向连续变化。还指出了观察四极涨落的可能性。
We have studied the antiferroquadrupole ordered phase of CeBin magnetic fields by resonant x-ray diffraction. By analyzing the significant change in the energy spectrum on reversing the field direction along, we have deduced field dependencies of the antiferro components of magnetic dipole, electric quadrupole, and magnetic octupole moments which are simultaneously induced in the Ceorbital with a propagation vector. The data treatments are based on theoretically calculated spectral functions. The existence of the field-induced octupole is also concluded for other field directions. We also show direct evidence for the formation of a linear-combination-type antiferroquadrupole order parameter in magnetic fields, which is expressed asand changes continuously with the field direction. A possibility of observing the quadrupolar fluctuation is also pointed out.