^<31>P Nuclear magnetic resonance and ^<101>Ru nuclear quadrupole resonance measurements of filled skutterudites GdRu_4P_<12> and TbRu_4P_<12>
^<31>P Nuclear magnetic resonance and ^<101>Ru nuclear quadrupole resonance measurements of filled skutterudites GdRu_4P_<12> and TbRu_4P_<12>
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^<31>P 填充方钴矿 GdRu_4P_<12> 和 TbRu_4P_<12> 的核磁共振和 ^<101>Ru 核四极共振测量
DOI：
10.1143/jpsj.80.044713
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
H.Fukazawa
中科院分区：
文献类型：
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作者：
K.Someya;A.Bamba;M.Ishida;H.Fukazawa
填充方钴矿GdRu 4P 12和TbRu 4P 12在22和20 K以下分别表现出反铁磁有序。在TbRu 4P 12中，在零场下约10 K处存在额外的异常;这种连续转变的起源可能与多极有序有关。为了确定GdRu 4P 12和TbRu 4P 12的详细磁性，我们对它们进行了零场31 P核磁共振（NMR）和101 Ru核四极共振（NQR）测量。零场~（31）P-NMR谱表明，GdRu_4P_（12）和TbRu_4P_（12）样品仅在22 K和20 K发生了磁转变。在TbRu 4P 12的101 Ru-NQR中，我们观察到自旋-晶格弛豫速率1/T1的反常温度依赖性在20 K以下，并且在10 K附近有一个小的反常。1/T1的温度依赖性也表明GdRu 4P 12和TbRu 4P 12有序态的嵌套条件比SmRu 4P 12差。
Filled skutterudites GdRu4P12and TbRu4P12exhibit antiferromagnetic ordering below 22 and 20 K, respectively. In TbRu4P12, an additional anomaly exists at around 10 K under a zero field; the origin of this successive transition might be related to multipole ordering. In order to determine the detailed magnetic properties of GdRu4P12and TbRu4P12, we performed zero-field31P nuclear magnetic resonance (NMR) and101Ru nuclear quadrupole resonance (NQR) measurements on them. The zero-field31P-NMR spectra indicate the occurrence of magnetic transition only at 22 K (GdRu4P12) and 20 K (TbRu4P12). We observed an anomalous temperature dependence of the spin–lattice relaxation rate 1/T1just below 20 K and a small anomaly at around 10 K in the101Ru-NQR of TbRu4P12. The temperature dependence of 1/T1also indicates that the nesting condition in the ordered states of GdRu4P12and TbRu4P12is poorer than that of SmRu4P12.