Magnetic properties and enhanced magnetic refrigeration in (Mn 1-xFex)5Ge3 compounds

Q. Zhang, J. Du, Y. B. Li, N. K. Sun, W. B. Cui, D. Li, Z. D. Zhang

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Abstract

Magnetic and magnetocaloric effects of (Mn1-x Fex) 5 Ge3 compounds are studied systematically. The maximum of magnetic entropy changes of 8.01 J/kg K under an external field change of 5 T is obtained for (Mn0.9 Fe0.1) 5 Ge3, which is the largest value in Mn5 Ge3 -based solid solutions. Moreover, the Fe substitution increases the refrigeration capacity (RC) value greatly. The largest RC value of 237 J/kg in (Mn0.8 Fe0.2) 5 Ge3 even compares favorably to that of many well-known magnetic refrigeration materials. Thus the Fe-containing (Mn1-x Fex) 5 Ge3 compounds are much-improved magnetic refrigerants for the application of room-temperature magnetic refrigeration. The increase of the RC value is probably resulted from the formation of magnetic nanostructure.

Original languageEnglish
Article number123911
JournalJournal of Applied Physics
Volume101
Issue number12
DOIs
StatePublished - 2007
Externally publishedYes

Funding

This work has been supported by the National Natural Science Foundation of China under Grant No. 50332020.

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