Study of the unusual increase in the Curie temperature of the residual amorphous phase in nanocrystalline Fe90Zr7B2Cu1

Kiss, László and Kaptás, Dénes and Balogh, Judit and Gubicza, Jenő and Kemény, Tamás and Vincze, Imre (2004) Study of the unusual increase in the Curie temperature of the residual amorphous phase in nanocrystalline Fe90Zr7B2Cu1. Journal of Magnetism and Magnetic Materials, 272-76. pp. 1410-1412. ISSN 0304-8853

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Abstract

Nanocrystalline Fe90Zr7B2Cu1 with ferromagnetic BCC nanocrystals of about 10-20 nm size embedded in a residual amorphous matrix was produced from amorphous precursor by partial crystallization. A significant increase in the Curie temperature of the residual amorphous phase (T-C) as compared to that of the amorphous precursor was found by combined bulk magnetic and Mossbauer measurements. The unusual increase of T-C for alloys with different nanocrystalline fractions correlates with the quantity of the BCC phase.

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