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Magnetic properties of amorphous $Fe_{73.5}Cu_1Mo_3Si_{12.5}Al_1B_9$ alloy

Prabhu, D and Ganesan, K and Narayanasamy, A and Chattopadhyay, K and Ponpandian, N (2007) Magnetic properties of amorphous $Fe_{73.5}Cu_1Mo_3Si_{12.5}Al_1B_9$ alloy. In: Materials Science and Engineering A, 449-45 . pp. 452-455.

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The FINEMET type $Fe_{73.5}Cu_1Mo_3Si_{12.5}Al_1B_9$ (numbers indicate at.%) alloy has been synthesized using single wheel melt spinning technique. The samples have been thermally annealed at about 40K less than the crystallization temperature for various durations. The samples show increase in Curie temperature of the amorphous phase with annealing. To get a better insight into their magnetic behaviour we have done spin wave analysis on the as-spun and thermally annealed samples and extracted the spin wave stiffness constant and mean square range of exchange interaction. Low temperature thermomagnetic measurements from 10 to 300K were performed with an applied field of 0.5 T. The data were fitted using the Bloch equation. The value of the C/B ratio and the mean square range of exchange interaction were found to be characteristic of amorphous ferromagnets.The variation of spin wave stiffness constant is correlated to the changes in Curie temperature and the nature of the exchange interaction existing in this alloy is determined.

Item Type: Journal Article
Publication: Materials Science and Engineering A
Publisher: Elsevier
Additional Information: Copyright of this article belongs to Elsevier. This article is also published in Proceedings of the 12th International Conference on Rapidly Quenched & Metastable Materials.
Keywords: Curie temperature;Spin wave stiffness constant;Mean square range of exchange interaction;Thermomagnetization.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 28 Jul 2008
Last Modified: 19 Sep 2010 04:48
URI: http://eprints.iisc.ac.in/id/eprint/15260

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