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Interaction between TLS and the conduction electronsin actinide arsenoselenides: a high‐pressure study
Author(s) -
Cichorek T.,
Bauer E. D.,
Wojakowski A.,
Henkie Z.,
Maple M. B.,
Steglich F.
Publication year - 2003
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.200301677
Subject(s) - diamagnetism , hydrostatic pressure , ferromagnetism , condensed matter physics , high pressure , actinide , anomaly (physics) , kondo effect , electrical resistivity and conductivity , thermal conduction , logarithm , materials science , chemistry , physics , thermodynamics , magnetic field , nuclear chemistry , mathematics , quantum mechanics , mathematical analysis
Electrical resistance R ( T ) measurements on UAsSe and ThAsSe single crystals were performed under hydrostatic conditions at pressures up to 1.88 GPa (2 K ≤ T ≤ 300 K). For ferromagnetic UAsSe, a reduction of a low‐ T upturn in R ( T ) accompanied by an increase of T C was observed. However, this effect is smaller than that introduced by chemical substitution. For diamagnetic ThAsSe, a hump‐like anomaly ( T = 65 K, p = 0) vanishes at p = 1.88 GPa. However, the ratio R (4.2 K)/ R (300 K) was only slightly reduced by pressure. Below 20 K, a pressure‐independent logarithmic increase of R ( T ) over one decade in temperature has been found. The results reported here fit well with the theoretical predictions of the non‐magnetic TLS Kondo model.