Eur. Phys. J. Appl. Phys.
Volume 42, Number 3, June 2008
|Page(s)||287 - 291|
|Section||Magnetism, Superconductivity and Related Devices|
|Published online||04 June 2008|
Thermodynamic and magnetic analysis of RCo9Si4 system with R = Pr, Nd and Sm
Physics department, College of Science, Qassim University, PO 6644, 51452 Buryadh, Kingdom of Saudi Arabia
Institut für Festkörperphysik, TU Wien, 1040 Wien, Austria
Corresponding author: email@example.com
Revised: 11 March 2008
Accepted: 27 March 2008
Published online: 4 June 2008
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.
PACS: 74.70.Dd – Ternary compounds, quaternary, and multinary compounds / 75.40.Cx – Specific heat for magnetic systems / 65.40.Gd – Entropy / 75.30.Cr – Saturation moments and magnetic susceptibilities
© EDP Sciences, 2008
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