Magnetic Structure of Short-Range Ordering in Intermetallic Antiferromagnet Mn3RhSi
Magnetic Structure of Short-Range Ordering in Intermetallic Antiferromagnet Mn3RhSi
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DOI：
10.7566/jpsj.90.074710
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发表时间：
2021-07-15
影响因子：
1.7
通讯作者：
Otomo, Toshiya
中科院分区：
文献类型：
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作者：
Kodama, Katsuaki;Honda, Takashi;Otomo, Toshiya
利用粉末中子衍射数据估算了金属间化合物反铁磁体Mn 3RhSi的磁偶分布函数（mPDF）。mPDF在反铁磁转变温度T-N以上的最近邻Mn-Mn距离r = 2.7埃处出现负峰。在T-N以下，mPDF是在r = 2.7埃附近有负峰的mPDF和由以前的中子衍射研究确定的反铁磁结构计算的mPDF的叠加，表明短程有序和反铁磁长程有序共存。与晶体结构对称性一致的磁结构模型不能再现短程有序的mPDF。提出了一种可能的磁结构，它可以再现所观察到的短程有序的mPDF。
Magnetic pair distribution function (mPDF) of intermetallic antiferromagnet Mn3RhSi is estimated from the powder neutron diffraction data. The mPDF exhibits negative peak at about r = 2.7 angstrom corresponding to the nearest neighbor Mn-Mn distance above the antiferromagnetic transition temperature T-N. Below T-N, the mPDF is a superposition of the mPDF with the negative peak at about r = 2.7 angstrom and the mPDF calculated from the antiferromagnetic structure which is determined by the previous neutron diffraction study, indicating the coexistence of the short range ordering and the antiferromagnetic long range ordering. The mPDF of the short range ordering is not reproduced by the magnetic structure model with the symmetry consistent with that of the crystal structure. The possible magnetic structure which can reproduce the observed mPDF of the short range ordering is proposed.