Structural and Thermomagnetic Properties of Fe86-xZr7MxNb2Cu1B4 (M = Co, Ni, (CoCr); x=0 or 6) Amorphous Alloys
A. Łukiewska
Institute of Physics, Częstochowa University of Technology, Armii Krajowej 19, 42-200 Częstochowa, Poland
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The effect of the substitution of Co, Ni or (CoCr) for the part of Fe atoms on the thermal stability and some magnetic properties, i.e. magnetization and magnetocaloric effect of Fe86-xZr7MxNb2Cu1B4 (M = Co, Ni, (CoCr); X=0 or 6) alloys was investigated. From X-ray studies it was stated that the investigated alloys in the as-quenched state and after the accumulative annealing for 10 min at 600 K and then 700 K were fully amorphous. The amorphous as-quenched Fe80Zr7Ni6Nb2Cu1B4 alloy shows the lowest thermal stability and the onset of its crystallization temperature is equal to 775 K. The Arrott plots are almost linear and show positive slope near the Curie temperature. The maximum magnetic entropy change is very sensitive to the chemical composition and annealing conditions of the alloys.

DOI: 10.12693/APhysPolA.131.738
PACS numbers: 65.60.+a, 75.50.Kj, 75.50.Bb, 75.30.Sg