Large magnetic entropy change and low hysteresis loss in the Nd- and Co-doped La ( Fe , Si ) 13 compounds

The effect of Nd and Co substitution on magnetic entropy changes and hysteresis losses has been investigated for the cubic Na Zn 13 -type La Fe 13 − x Si x compounds. Partially replacing La with Nd leads to a decrease of the Curie temperature T C and an increase of the magnetic entropy change Δ S ....

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Bibliographic Details
Published in:Journal of applied physics 2008-04, Vol.103 (7), p.07B317-07B317-3
Main Authors: Shen, Jun, Li, Yang-Xian, Zhang, Jian, Gao, Bo, Hu, Feng-Xia, Zhang, Hong-Wei, Chen, Yun-Zhong, Rong, Chuan-Bing, Sun, Ji-Rong
Format: Article
Language:English
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Summary:The effect of Nd and Co substitution on magnetic entropy changes and hysteresis losses has been investigated for the cubic Na Zn 13 -type La Fe 13 − x Si x compounds. Partially replacing La with Nd leads to a decrease of the Curie temperature T C and an increase of the magnetic entropy change Δ S . Substitution of Co for Fe in La 0.7 Nd 0.3 Fe 10.5 Si 1.5 can adjust T C to around room temperature. A large Δ S of 15 J ∕ Kg K at T C = 280 K for a field change from 0 to 5 T and a small hysteresis loss close to zero near T C have been obtained in La 0.7 Nd 0.3 Fe 10.7 Co 0.8 Si 1.5 . The Co-doped Na Zn 13 -type LaNdFeSi compounds may be a suitable candidate for magnetic refrigerant near room temperature.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.2829035