Perturbation on Hyperfine-enhanced ${}^{141}$Pr Nuclear Spin Dynamics Associated with Antiferroquadrupolar Order in PrV${}_2$Al${}_{20}$

Abstract

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/$T_{1,\mu }$) 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/$T_{1,\mu }$ 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/)

References in corpus (3)

• Heavy Fermion Superconductivity in the Quadrupole Ordered State of PrV2Al20
• Muon spin relaxation and hyperfine-enhanced 141Pr nuclear spin dynamic in Pr(Os,Ru)4Sb12 and (Pr,La)Os4Sb12
• Quantized Hyperfine Field at an Implanted ${\mu }^{+}$ Site in PrPb${}_3$: Interplay between Localized $f$ Electrons and an Interstitial Charged Particle

Cited by in corpus (3)

• Magnetoelectric Effects and Charge-Imbalanced Solenoids: Antiferro Quadrupole Orders in a Diamond Structure
• Unveiling Quadrupolar Kondo Effect in the Heavy Fermion Superconductor PrV${}_2$Al${}_{20}$
• First-principles Study of the RKKY Interaction and the Quadrupole Order in the Pr 1-2-20 systems PrT2Al20 (T=Ti, V)