Perturbation on hyperfine-enhanced<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi>Pr</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>141</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>nuclear spin dynamics associated with antiferroquadrupolar order in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>PrV</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Al</mml:mi><mml:mn>20</mml:mn></mml:msub></mml:mrow></mml:math>
Description
The nature of multipolar order and hyperfine-enhanced (HE) $^{141}$Pr nuclear spin dynamics in PrV$_2$Al$_{20}$ was investigated using the muon spin relaxation technique. No explicit sign of time-reversal symmetry breaking was found below the multipolar order temperature $T_Q\sim 0.6$ 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. 80, 063701 (2011)]. Further evidence of the nonmagnetic ground state was obtained from the observation of HE $^{141}$Pr nuclear spin fluctuations in the MHz scale. A marked increase in the muon spin-lattice relaxation rate (1/$T_{\rm 1,��}$) was observed below 1 K with decreasing temperature, which was attributed to the perturbation on the HE $^{141}$Pr nuclear spin dynamics associated with the development of AFQ correlations. The longitudinal field dependence of 1/$T_{\rm 1,��}$ revealed that the enhanced $^{141}$Pr nuclear spin accidentally has an effective gyromagnetic ratio close to that of the muon.
5 pages, 2 figures, accepted for publication in Phys. Rev. B (http://journals.aps.org/prb/)
Journal
-
- Physical Review B
-
Physical Review B 92 (12), 2015-09-29
American Physical Society (APS)
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1360285709964051840
-
- ISSN
- 1550235X
- 10980121
-
- Data Source
-
- Crossref
- KAKEN
- OpenAIRE