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伊藤 孝; 髭本 亘; 酒井 明人*; 中辻 知*; 辻本 真規*
Physical Review B, 92(12), p.125151_1 - 125151_5, 2015/09
被引用回数:5 パーセンタイル:23.78(Materials Science, Multidisciplinary)The nature of multipolar order and hyperfine-enhanced (HE) Pr nuclear spin dynamics in PrVAl was investigated using the muon spin relaxation technique. No explicit sign of time-reversal symmetry breaking was found below the multipolar order temperature K in a zero applied field as anticipated on the basis of the antiferroquadrupolar (AFQ) order picture proposed by Sakai and Nakatsuji [J. Phys. Soc. Jpn. , 063701 (2011)]. Further evidence of the nonmagnetic ground state was obtained from the observation of HE Pr nuclear spin fluctuations in the MHz scale. A marked increase in the muon spin-lattice relaxation rate (1/) was observed below 1K with decreasing temperature, which was attributed to the perturbation on the HE Pr nuclear spin dynamics associated with the development of AFQ correlations.