Effect of Partial Substitution of La by Ce on the Nature of Phase Transition in Magnetocaloric La1−xCexFe11.2Co0.7Si1.1 Alloys

The influence of Ce addition on the nature of phase transition in the La 1− x Ce x Fe 11.2 Co 0.7 Si 1.1 ( x  = 0, 0.1) alloy system has been investigated. The substitution of Ce for La leads to a decrease of Curie temperature from 264 K to 254 K and to an increase of the maximum value of magnetic e...

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Bibliographic Details
Published in:Journal of electronic materials 2017-11, Vol.46 (11), p.6518-6522
Main Authors: Gębara, P., Marcin, J., Škorvánek, I.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Electronics and Microelectronics
Instrumentation
Materials Science
Optical and Electronic Materials
Solid State Physics
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Summary:The influence of Ce addition on the nature of phase transition in the La 1− x Ce x Fe 11.2 Co 0.7 Si 1.1 ( x  = 0, 0.1) alloy system has been investigated. The substitution of Ce for La leads to a decrease of Curie temperature from 264 K to 254 K and to an increase of the maximum value of magnetic entropy change from 19.3 J/(kg K) to 21.5 J/(kg K). A detailed analysis of phase transition using Arrott plots, the Landau theory for order parameter and the construction of a universal scaling curve revealed that replacing 10 at.% La with Ce drives the magnetic transition from second-order to first-order and enhances a field-induced itinerant electron metamagnetic transition above T C .
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-017-5682-7