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Title: Large magnetocaloric effect in re-entrant ferromagnet PrMn1.4Fe0.6Ge2
Authors: Zeng, R
Dou, SX
Wang, JL
Campbell, SJ
Keywords: Phase transformations
Specific heat
Temperature range
Issue Date: 17-Feb-2011
Publisher: Elsevier
Citation: Zeng, R., Dou, S. X., Wang, J. L., & Campbell, S. J. (2011). Large magnetocaloric effect in re-entrant ferromagnet PrMn1.4Fe0.6Ge2. Journal of Alloys and Compounds, 509(7), L119-L123. doi:10.1016/j.jallcom.2010.12.047
Abstract: Magnetocaloric effects (MCE) at multiple magnetic phase transition temperatures in PrMn1.4Fe0.6Ge2 were investigated by heat capacity and magnetization measurements. PrMn1.4Fe0.6Ge2 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 (−ΔSM) 8.2 J/kg K and adiabatic temperature change (ΔTad) 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. © 2010, Elsevier Ltd.
Gov't Doc #: 3317
ISSN: 0925-8388
Appears in Collections:Journal Articles

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