Influence of Partial Substitution of Fe by Mn on the Thermomagnetic Properties of Magnetocaloric LaFe11.2Co0.7Si1.1 Alloy

P. Gębaraa and J. Marcinb aInstitute of Physics, Częstochowa University of Technology, Armii Krajowej 19, 42-200 Częstochowa, Poland bInstitute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia

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The aim of this paper was to study the influence of partial substitution of Fe by Mn in the LaFe11.2-xMnxCo0.7Si1.1 (where x=0.1, 0.2 and 0.3) alloys. Measurements revealed that a systematic increase of Mn in the alloy composition resulted in a decrease of the Curie temperature, which correlated with a decrease of the lattice parameter of the La(Fe,Si)13- type phase. For samples corresponding to Mn content x=0.1 and 0.2 a decrease of magnetic entropy change was observed. However in the case of the sample with x=0.3 an increase of magnetic entropy change was detected.

DOI: 10.12693/APhysPolA.133.648 PACS numbers: 75.30.Sg, 75.50.Bb