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Specific heat and velocity of sound in a moderate heavy-fermion compound YbZnCu4 |
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| Authors: | A V Golubkov L S Parfen’eva I A Smirnov D Wlosewicz H Misiorek J Mucha A Jezowski A I Krivchikov G A Zvyagina |
| Institution: | (1) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia;(2) Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wrocław, 50-950, Poland;(3) Verkin Institute for Low-Temperature Physics and Engineering, National Academy of Sciences of Ukraine, pr. Lenina 47, Kharkov, 61103, Ukraine |
| Abstract: | The specific heat at a constant pressure (C p) and the velocity of sound (v) are measured for a moderate heavy-fermion compound YbZnCu4 in the temperature range 3.5–250 K and at 77 K, respectively. The experimental values of C p and v obtained in this study and the phonon thermal conductivity previously measured in the temperature range 5–300 K are used to calculate the phonon mean free path l for this compound. The temperature dependence of the phonon mean free path l thus determined is characteristic of classical amorphous materials. |
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