Abstract
The magnetic properties and magnetocaloric effect in Fe 4 MnSi 3 B x compounds with x =0, 0.05, 0.10, 0.15, 0.20, 0.25 have been investigated. X-ray diffraction study shows that all these compounds investigated crystallize in the Mn 5 Si 3 -type structure with space group P6 3 /mcm. Boron insertion in the host ternary silicide Fe 4 MnSi 3 does not change the crystal symmetry, only leads to an increase of the lattice parameters, indicating the B atoms entered the interstitial sites. With increasing B content, the Curie temperature shifts to higher temperatures. The maximal magnetic-entropy changes of the Fe 4 MnSi 3 B x compounds with x =0, 0.10 and 0.20 are about 1.8 J/(kg·K), 1.8 J/(kg·K) and 1.6 J/(kg·K), respectively, for a field change from 0 to 1.5 T.
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