Muon Spin Relaxation and Nonmagnetic Kondo State in PrInAg_2

D. E. MacLaughlin; R. H. Heffner; G. J. Nieuwenhuys; P. C. Canfield; A. Amato; C. Baines; A. Schenck; G. M. Luke; Y. Fudamoto; Y. J. Uemura

Muon Spin Relaxation and Nonmagnetic Kondo State in PrInAg_2

Strongly Correlated Electrons 2019-08-17 v1

Authors: D. E. MacLaughlin , R. H. Heffner , G. J. Nieuwenhuys , P. C. Canfield , A. Amato , C. Baines , A. Schenck , G. M. Luke , Y. Fudamoto , Y. J. Uemura

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Abstract

Muon spin relaxation experiments have been carried out in the Kondo compound PrInAg_2. The zero-field muon relaxation rate is found to be independent of temperature between 0.1 and 10 K, which rules out a magnetic origin (spin freezing or a conventional Kondo effect) for the previously-observed specific heat anomaly at \sim0.5 K. The low-temperature muon relaxation is quantitatively consistent with nuclear magnetism including hyperfine enhancement of the ^{141}Pr nuclear moment. This is strong evidence against a Pr^{3+} electronic magnetic moment, and for the \Gamma_3 crystalline-electric-field-split ground state required for a nonmagnetic route to heavy-electron behavior. The data imply the existence of an exchange interaction between neighboring Pr^{3+} ions of the order of 0.2 K in temperature units, which should be taken into account in a complete theory of a nonmagnetic Kondo effect in PrInAg_2.

Keywords

muon spin relaxation Kondo effect nonmagnetic ground state crystalline electric field specific heat anomaly

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@article{arxiv.cond-mat/9809243,
  title  = {Muon Spin Relaxation and Nonmagnetic Kondo State in PrInAg_2},
  author = {D. E. MacLaughlin and R. H. Heffner and G. J. Nieuwenhuys and P. C. Canfield and A. Amato and C. Baines and A. Schenck and G. M. Luke and Y. Fudamoto and Y. J. Uemura},
  journal= {arXiv preprint arXiv:cond-mat/9809243},
  year   = {2019}
}

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9 pages, 2 eps figures, REVTeX

Muon Spin Relaxation and Nonmagnetic Kondo State in PrInAg_2

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