超卡戈米反铁磁体 Mn3RhSi 中的磁激发

Shin-ichi Shamoto, Hiroki Yamauchi, Kazuki Iida, Kazuhiko Ikeuchi, Koji Kaneko, Yu-Sheng Chen, Shin-ichiro Yano, Pai-Tse Hsu, Min Kai Lee, Amelia Elisabeth Hall, Geetha Balakrishnan, Lieh-Jeng Chang
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引用次数: 0

摘要

我们通过非弹性中子散射研究了单晶体在 0.3 至 140 meV 宽能量范围内的磁激发,在 Q=(2,0,0) 处观察到了突出的非弹性中子散射信号。尽管在 4 K 时长程有序磁矩仅为 2.61 μB,但对十二种磁子模式中的两种模式进行积分的非弹性散射强度可得出每个锰位点的局部磁矩约为 5 μB。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Magnetic excitation in the hyperkagome antiferromagnet Mn3RhSi

Magnetic excitation in the hyperkagome antiferromagnet Mn3RhSi
In a paramagnetic state of a hyperkagome lattice antiferromagnet Mn3RhSi, magnetic diffuse scattering by magnetic short-range order is observed over a wide temperature range of approximately 500 K above the Néel temperature of 190 K. We have studied the magnetic excitation with a single crystal in a wide energy range from 0.3 to 140 meV by inelastic neutron scattering, where the prominent inelastic neutron-scattering signal is observed at Q=(2,0,0). The inelastic scattering intensity integrated for two of twelve magnon modes leads to a localized magnetic moment of about 5 μB per Mn site, although the long-range ordered magnetic moment is only 2.61 μB at 4 K. The result suggests that a large part of the magnetic moment does not order in Mn3RhSi, possibly due to the geometrical spin frustration of the hyperkagome lattice.
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