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Heat capacity and magnetic properties in the (PdCO y )H x -system at low temperatures

Heat capacity and magnetic properties in the (PdCO y )H x -system at low temperatures Results of heat capacity measurements on (PdCo y )H x (y ⩽ 2.5 at %; 0 ⩽ x ⩽ 0.8) in the temperature range from 2 to 12 K are reported. The dependence of the γ coefficient of the electronic heat capacity on the Co content and on the x value is considered. For the binary alloy PdCo y a decreasing spin wave contribution to the heat capacity (αT 3/2) is found, which agrees well with the known ferromagnetic properties of the alloy. In contrast, for the β phase of (PdCo y )H x a contribution to the heat capacity can be separated, probably caused by the thermal excitation of magnetic clusters. The temperature dependence of this cluster contribution can be well explained by means of an Einstein function. Conclusions are drawn with regard to the intercluster interaction and to the number of atoms per cluster. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Heat capacity and magnetic properties in the (PdCO y )H x -system at low temperatures

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References (17)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00118627
Publisher site
See Article on Publisher Site

Abstract

Results of heat capacity measurements on (PdCo y )H x (y ⩽ 2.5 at %; 0 ⩽ x ⩽ 0.8) in the temperature range from 2 to 12 K are reported. The dependence of the γ coefficient of the electronic heat capacity on the Co content and on the x value is considered. For the binary alloy PdCo y a decreasing spin wave contribution to the heat capacity (αT 3/2) is found, which agrees well with the known ferromagnetic properties of the alloy. In contrast, for the β phase of (PdCo y )H x a contribution to the heat capacity can be separated, probably caused by the thermal excitation of magnetic clusters. The temperature dependence of this cluster contribution can be well explained by means of an Einstein function. Conclusions are drawn with regard to the intercluster interaction and to the number of atoms per cluster.

Journal

Journal of Low Temperature Physics – Springer Journals

Published: May 17, 2004

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