Abstract
Amorphous soft magnetic Fe80−x VxB12Si8 ribbons (0 ≤ x ≤ 14) have been fabricated by melt spinning technique, and their magnetic and magnetocaloric properties have been studied. The value of magnetocaloric effect has been determined from the measurements of magnetization as a function of temperature and an external magnetic field. The addition of vanadium to the ternary Fe80B12Si8 alloy results in a decrease of the Curie temperature of amorphous alloys, TC, from 473.5 to 335 K. With an increasing V content, the average magnetic moment of Fe atom and the magnetic entropy change also decrease. Fe66.3V13.7B12Si8 alloy exhibits the highest refrigeration capacity of 93.7 J kg−1 and moderate peak magnetic entropy of 1.034 J kg−1 K−1 (TC = 335 K) under the maximum applied field of 2 T. The results from this work showed that V containing amorphous alloy 13.7 at. % is an interesting material and potential candidate for magnetic refrigerants working near room temperature. The observed −ΔSMmax values compare favorably with other amorphous Fe-based alloys.
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