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Thermodynamic and magnetic analysis of RCo9Si4 system with R = Pr, Nd and Sm

Published online by Cambridge University Press:  04 June 2008

M. El-Hagary
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Abstract

Thermodynamic and magnetic measurements of ternary compounds RCo9Si4 with R = Pr, Nd, and Sm were analyzed in order to estimate the magnetic entropy, specific heat jump and effective magnetic moments. The samples show a ferromagnetic behaviour at low temperature with TC varying from 10 to 35 K. The saturation magnetisation Ms at 2 K with 6 T is found to be about 23.20, 24.94 and 10.70 emu/g for R = Pr, Nd, and Sm, respectively. The total effective magnetic moments μeff of RCo9Si4 for R = Pr , Nd, and Sm as obtained from the Curie constant C are estimated to be 4.94 μB, 5.26 μB, and 3.90 μB, respectively. The magnetic specific heat jump ΔCp at TC is found to be 12, 3.6, and 10.5 J/mol K for RCo9Si4 with R = Pr, Nd, and Sm, respectively. Magnetic entropy SM associated with the magnetic ordering in RCo9Si4 (R = Pr, Nd and Sm) were estimated to vary from 19.15 J/mol K and 14.90 J/mol K.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 42 , Issue 3 , June 2008 , pp. 287 - 291
Copyright
© EDP Sciences, 2008

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