N. I. Odina, A. I. Korobov, “Experimental study of the Grüneisen parameter of a fullerite C<nobr>$_{60}$</nobr> single crystal near phase transitions at 90 and 260 K by the photoacoustic method”, Fizika Tverdogo Tela, 2014, Volume 56, Issue 4,Pages <nobr>811

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Fullerenes

Experimental study of the Grüneisen parameter of a fullerite C$_{60}$ single crystal near phase transitions at 90 and 260 K by the photoacoustic method

N. I. Odina, A. I. Korobov

Lomonosov Moscow State University

Abstract: The behavior of the Grüneisen parameter of single-crystal fullerite C$_{60}$ has been studied experimentally near orientational phase transitions at 90 and 260 K. The measurements have been performed by the photoacoustic method using an automated photoacoustic device with laser excitation (the intensity was modulated by a harmonic law) and shadow piezoelectric detection. The temperature dependence of the relative change in the Grüneisen parameter in the fullerite C$_{60}$ single crystal has been measured near the phase transitions at 90 and 260 K. The results have been analyzed.

Received: 23.09.2013