The Soft Magnetic Properties and Temperature Stability of Co-Fe-Zr-B Metallic Glasses

J. Bednarčík a, b, J. Kováč c, S. Roth d, J. Fűzer b, P. Kollár b, L. Varga e and H. Franz a a Deutsches Elektronen Synchrotron (HASYLAB), Notkestr. 85, 22607 Hamburg, Germany b Institute of Physics, Faculty of Science, P. J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia c Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia d IFW Dresden, Institut fŰr Metallische Werkstoffe, Helmholtzstr. 01069 Dresden, Germany e RISSPO, Hungarian Academy of Sciences, P. O. Box 49, 1525 Budapest, Hungary

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Received: 9 07 2007;

In the present work multicomponent Co-based alloys with nominal composition Co72-x FexZr8B20 (x=10, 15, and 20 at. %) were synthesized by single-roller melt-spinning. The measurement of coercivity, Hc, reveals the soft magnetic behavior of investigated alloys. The value of Hc increases from 23 A/m for alloy with x=10 at. % up to 32 A/m for alloy with x=20 at. %. Further it was found that crystallization temperature of as-quenched alloys slightly varies with iron content and lays between 605 and 625°C. From the temperature dependence of magnetization it follows that partial substitution of cobalt by iron has positive influence on the Curie temperature of amorphous phase, Tam c, which increases from 300°C up to 462°C for alloy with x=10 at. % and x=2 0 at. %, respectively.

DOI: 10.12693/APhysPolA.113.83 PACS numbers: 61.10.Nz, 75.50.Kj