期刊
PHYSICAL REVIEW B
卷 80, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.184413
关键词
cerium alloys; electrical resistivity; entropy; ferromagnetic materials; ferromagnetic-paramagnetic transitions; indium alloys; magnetic hysteresis; magnetic susceptibility; magnetisation; paramagnetic materials; specific heat; thermal expansion
资金
- Direction of the Universities of the Ministry of Science and Education of Spain [MAT2008-06542-C04]
- Juan de la Cierva program
Measurements of the magnetic, thermal, and transport properties of the CeIn2 binary alloy are consistent with a paramagnetic-ferromagnetic transition at T-C=22 K. A discontinuity in the magnetic entropy, electrical resistivity and thermal expansion, and a huge anomaly in the specific heat of 113 J/mol K (Delta c(mag)=103 J/mol K), at the magnetic transition, are observed. In addition, the Arrott plots show negative slope at low fields, the field-cooling and field-warming magnetization present irreversibility, and both the susceptibility and the resistivity evidence a small thermal hysteresis of 0.05 K. Moreover, the values of the entropy change calculated from the magnetization data using the Clausius-Clapeyron equation are in good agreement with those directly obtained from the specific-heat data. The joint analysis of all these results provides evidence for the first order character of this magnetic transition in CeIn2.
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