Muon spin rotation and relaxation in Pr1-xNdxOs4Sb12: paramagnetic states

Muon spin rotation and relaxation in Pr1-xNdxOs4Sb12: paramagnetic states
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Pr1-xNdxOs4Sb12 中的 μ 子自旋旋转和弛豫:顺磁态

DOI:
10.1103/physrevb.89.235111
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发表时间:
2015
期刊:
Phys. Rev. B
影响因子:
--
通讯作者:
and R. H. Fukuda
and R. H. Fukuda
中科院分区:
--
文献类型:
--
作者:
P.-C. Ho;D. E. MacLaughlin;L. Shu;O. O. Bernal;S. Zhao;A. A. Dougraghi;T. Yanagisawa;M. B. Maple;and R. H. Fukuda

文献摘要

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在合金的顺磁态中测量了正μ介子的Knight位移,分别为0.25,0.45,0.50,0.55,0.75和1.00。在Pr取代的()中,而不是在中,Knight位移与磁化率的Clogston-Jaccarino图在大磁化率(低温)下表现出at %的异常饱和,表明自旋与顺磁性之间的耦合强度随温度K的降低而降低。我们推测,巡回四极激发,调用调解超导库珀对相互作用,可能会修改离子间接自旋-自旋相互作用。
Positive-muon () Knight shifts have been measured in the paramagnetic states ofalloys, where, 0.25, 0.45, 0.50, 0.55, 0.75, and 1.00. In Pr-substituted(), but not in, Clogston-Jaccarino plots ofKnight shiftversus magnetic susceptibilityexhibit an anomalous saturation ofat% for large susceptibilities (low temperatures), indicating a reduction of the coupling strength betweenspins andparamagnetism for temperaturesK. We speculate that itinerantquadrupolar excitations, invoked to mediate the superconducting Cooper-pair interaction, might modify the-ion indirect spin-spin interaction.