Magnetocaloric Properties of Fe75Mo8Cu1B16 and Fe81Mo8Cu1B10 Metallic Glasses
M. Hasiaka, M. Miglierinib,c, J. Kaleta a and M. Bujdoš d
aDepartment of Mechanics and Materials Science, Wrocław University of Technology, Smoluchowskiego 25, 50-370 Wrocław, Poland
b Institute of Nuclear and Physical Engineering, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology in Bratislava, Ilkovičova 3, 812-19 Bratislava, Slovakia
cRegional Centre of Advanced Technologies and Materials, Palacky University, 17. listopadu 12, 771-46 Olomouc, Czech Republic
dInstitute of Laboratory Research on Geomaterials, Faculty of Natural Sciences, Comenius University, Mlynská Dolina, 842-15 Bratislava, Slovakia
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Microstructure and thermomagnetic properties for the Fe75Mo8Cu1B16 and Fe81Mo8Cu1B10 metallic glasses in the as-quenched state and after heat treatment at 643 K and 723 K are studied. The inverse change of the Curie point was observed for Fe75Mo8Cu1B16 metallic glass after annealing below the onset of crystallization. It is attributed to structural relaxation of the amorphous phase. The maximum of magnetic entropy change calculated for magnetic field of 1.0 T occurs for the Fe75Mo8Cu1B16 alloy annealed at 643 K at temperature close to the Curie point and equals 0.74 J kg-1 K-1.

DOI: 10.12693/APhysPolA.127.608
PACS numbers: 75.30.Sg, 71.23.Cq, 76.80.+y, 87.64.Pj