Large magnetocaloric effect in re-entrant ferromagnet PrMn 1.4Fe0.6Ge2

Authors

Rong Zeng, University of WollongongFollow
S X. Dou, University of WollongongFollow
Jianli Wang, University of WollongongFollow
Stewart J. Campbell, UNSWFollow

RIS ID

35309

Publication Details

Zeng, R, Dou, SX, Wang, J & Campbell, SJ, (2011), Large magnetocaloric effect in re-entrant ferromagnet PrMn_1.4Fe_0.6Ge₂^, Journal of Alloys and Compounds, 509(7), pp. L119-L123.

Abstract

Magnetocaloric effects (MCE) at multiple magnetic phase transition temperatures in PrMn_1.4Fe_0.6Ge₂ were investigated by heat capacity and magnetization measurements. PrMn_1.4Fe_0.6Ge₂ is of a re-entrant ferromagnet and performs multiple magnetic phase transitions in the temperature range from 5 to 340 K. A large magnetic entropy change (−ΔS_M) 8.2 J/kg K and adiabatic temperature change (ΔT_ad) 4.8 K are observed for a field change of 0–1.5 T around 25.5 K, associated with the field-induced first order magnetic phase transition (FOMT) from the antiferromagnetic to the ferromagnetic state with an additional Pr magnetic contribution. These results suggest that a re-entrant ferromagnet is probably promising candidate as working material in the hydrogen and nature gas liquefaction temperature range magnetic refrigeration technology.

Grant Number

ARC/DP0879070

Additional Grant Number

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