Abstract
The specific heat C total of crystalline and amorphous Eu2(MoO4)3 is measured in the temperature interval 4.5–30 K. The amorphous state is obtained by applying pressure ∼7 GPa at room temperature. It is found that the specific heat of the crystal at T⩽7.5 K is described by a cubic function of temperature, while the specific heat of the amorphous sample has a strongly non-Debye character in the entire experimental temperature interval. The curve of C total for amorphous europium molybdate is analyzed in a model of soft atomic potentials, and it is shown that it agrees well with universal low-temperature anomalies of the specific heat of classical glasses obtained by quenching from the liquid.
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Pis’ma Zh. Éksp. Teor. Fiz. 68, No. 8, 623–627 (25 October 1998)
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Pal’nichenko, A.V., Ponyatovskii, E.G., Red’kin, B.S. et al. Low-temperature specific heat of crystalline and amorphous Eu2(MoO4)3 . Jetp Lett. 68, 657–661 (1998). https://doi.org/10.1134/1.567924
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DOI: https://doi.org/10.1134/1.567924