Re-entrant ferromagnet PrMn2Ge0.8Si1.2: Magnetocaloric effect

Authors

S X. Dou, University of WollongongFollow
Jianli Wang, University of WollongongFollow
Rong Zeng, University of WollongongFollow
Chung-Kiak Poh, University of WollongongFollow
Stewart J. Campbell, UNSWFollow
S J. Kennedy, Bragg Institute ANSTO Australia

RIS ID

31401

Publication Details

Wang, J. L., Campbell, S. J., Zeng, R., Poh, C., Dou, S. Xue. Kennedy, S. J. (2009). Re-entrant ferromagnet PrMn₂Ge_0.8Si_1.2: Magnetocaloric effect. Journal of Applied Physics, 105 (7), 07A909-1-07A909-3.

Abstract

The structural and magnetic properties of the re-entrant ferromagnet PrMn₂Ge_0.8Si_1.2 have been investigated by various experimental methods. Similar to the canonical re-entrant ferromagnet SmMn₂Ge₂, multiple magnetic phase transitions have been detected in PrMn₂Ge_0.8Si_1.2 over the temperature range from 10 to 550 K with re-entrant ferromagnetism occurring around ∼ 54 K. The magnetocaloric effect has been measured in terms of the isothermal magnetocaloric entropy change and found to be positive at the re-entrant ferromagnetic transition with a maximum value of around 1.9 J/kg K at 58 K for a magnetic field change of 0–3 T. On the other hand, the entropy change becomes negative ( ∼ −0.5 J/kg K) at the antiferromagnetic to ferromagnetic transition for the same field change.

Grant Number

ARC/DP0879070

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0879070