Evidence for hidden quadrupolar fluctuations behind the octupole order in Ce0.7La0.3B6 from resonant x-ray diffraction in magnetic fields
Evidence for hidden quadrupolar fluctuations behind the octupole order in Ce0.7La0.3B6 from resonant x-ray diffraction in magnetic fields
复制标题
来自磁场共振 X 射线衍射的 Ce0.7La0.3B6 八极级背后隐藏的四极波动的证据
DOI：
10.1103/physrevb.89.014422
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发表时间：
2014
影响因子：
3.7
通讯作者：
T. Matsumura
中科院分区：
文献类型：
--
作者：
H. Kusunose;Y. komoto;足立匡;T. Matsumura
多极有序相CeLaB，出现低于1.5 K和命名相IV，已研究了在磁场中的共振X射线衍射。利用金刚石X射线相位片旋转入射线偏振和传统的晶体分析仪系统，全线偏振分析已被执行，以确定有序参数。分析表明，在第IV相，（，）四极子比（和）四极子在（）反铁八极子级上更多地受场的诱导。问题是这个结果与平均场计算相矛盾，平均场计算不可避免地给出四极矩作为主要的感应矩。这一结果表明四极级在能量上是接近的。我们认为在八极子的初级有序化背后隐藏着四极子的大的涨落，多极涨落对有序化现象有显著的影响。
The multipole ordered phase in CeLaB, emerging below 1.5 K and named phase IV, has been studied by resonant x-ray diffraction in magnetic fields. By utilizing diamond x-ray phase plates to rotate the incident linear polarization and a conventional crystal analyzer system, full linear polarization analysis has been performed to identify the order parameters. The analysis shows that the(,,) quadrupoles are more induced by the field than the(and) quadrupoles on the() antiferro-octupole order in phase IV. The problem is that this result is contradictory to a mean-field calculation, which inevitably gives thequadrupole as the main induced moment. This result indicates that thequadrupole order is close in energy. We consider that a large fluctuation of thequadrupole is hidden behind the primary ordering of theoctupole and that the multipolar fluctuation significantly affects the ordering phenomenon.