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YbPd₂In: a promising candidate to strong entropy accumulation at very low temperature

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arxiv 1711.02335 v3 pith:BWKNQMEI submitted 2017-11-07 cond-mat.str-el

YbPd₂In: a promising candidate to strong entropy accumulation at very low temperature

F. Gastaldo , S. Gabani , A. D\v{z}ubinsk\'a , M. Reiffers , G. Prist\'a\v{s} , I. \v{C}url\'ik , P. Skyba , M. Clovecko
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F. Vavrek J. G. Sereni M. Giovannini
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classification cond-mat.str-el
keywords magnetictemperatureveryybpdcandidatecompoundeffectentropy
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We report on synthesis, crystal structure, magnetic, thermodynamic and transport properties of the new compound YbPd$_2$In, crystallizing as a Heusler structure type. A trivalent state of the rare earth was determined by fitting the magnetic susceptibility with a Curie-Weiss law. This compound is characterized by showing very weak magnetic interactions and a negligible Kondo effect. A specific heat jump was observed at $T\approx 250$ mK, followed at higher temperature by a power law decrease of $C_P(T)/T$. The resulting large electronic entropy increase at very low temperature is rapidly shifted to higher temperature by the application of magnetic field. This magnetocaloric effect places YbPd$_2$In as a very good candidate for adiabatic demagnetization cooling processes.

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