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This study discusses the crystal structure and magnetic properties of the rare-earth doped La0.8R0.2(Fe0.88Si0.12)13 (with R = Sm, Tb) compounds. All the samples were prepared by using arc-melting technique in argon atmosphere and the obtained result shows that after heat treatment, the samples exhibited the NaZn13-type cubic phase with a small amount of a secondary ¡-Fe phase. The magnetic properties and magnetic entropy change were determined by mean of the temperature and field dependence magnetizations. Besides the decrease in the lattice constants, there was also observed a significant increase of Curie temperature and magnetic entropy change 1¦SM which reached a maximum of 4.5 J/kgK for La0.8Sm0.2(Fe0.88Si0.12)13, corresponding to a relative cooling powers (RCP) of 102 J/kg for the sample. [doi:10.2320/matertrans.MD201716]

materials transactions

Crystal Structure and Magnetic Properties of La&lt;sub&gt;0.8&lt;/sub&gt;R&lt;sub&gt;0.2&lt;/sub&gt;(Fe&lt;sub&gt;0.88&lt;/sub&gt;Si&lt;sub&gt;0.12&lt;/sub&gt;)&lt;sub&gt;13&lt;/sub&gt; (R = Sm and Tb) Compounds