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Elastic property of the Yb‐based heavy fermion compound YbPtSb
Author(s) -
Nakanishi Yoshiki,
Ito Kankichi,
Kamiyama Toru,
Kashiwazaki Reiko,
Deto Kazuhisa,
Shichinomiya Fumitaka,
Nakamura Mitsuteru,
Yoshizawa Masahito,
Suzuki Hiroyuki S.
Publication year - 2010
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200983026
Subject(s) - condensed matter physics , softening , fermi liquid theory , curie temperature , magnetic field , materials science , ambient pressure , physics , thermodynamics , quantum mechanics , superconductivity , ferromagnetism
We report measurements of elastic constants detected close to a quantum critical point (QCP) of YbPtSb using one of the best‐established macroscopic probes, ultrasonic method. The elastic constant shows a pronounced elastic softening toward zero temperature below around 20 K. It is noteworthy that these are not Curie type softening, which generally indicate a crystalline electric field (CEF) effect, but a logarithmic decrease of the elastic constant. Furthermore, with increasing magnetic field, the temperature range in which a logarithmic decrease of the elastic constant is observed shifts gradually to higher temperatures, suggesting a crossover from non‐Fermi liquid to Fermi liquid tuned by an external field. We discuss the first observation of NFL effects and its magnetic field dependence at ambient pressure in a high‐quality single crystal of an undoped Yb‐based heavy fermion compound: YbPtSb.Schematic crystal structure of YbPtSb.