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Metallic glasses; Mössbauer spectroscopy; magnetic properties

Magnetic metallic glass Fe₃₉Ni₃₉Mo₄Si₆B₁₂ has been studied by the⁵⁷Fe Mössbauer spectroscopy. Mössbauer spectra consist of broad and overlapping six-line pattern below the Curie temperature. The Curie and crystallization temperatures of this metallic glass have been determined to be 575 ± 3 K and 725 ± 3 K, respectively. The hyperfine magnetic field at room temperature is approximately 225 kOe. The reduced hyperfine fields of this sample decrease much faster than that observed for other iron-rich metallic glasses like Fe₄₀Ni₄₀B₂₀, Fe₈₀B₂₀ etc. This behaviour is attributed to the presence of molybdenum atoms in the sample.

B Bhanu Prasad¹ Anil K Bhatnagar¹ S Venkataraman¹ M N Chandrasekharaiah^{1 2}

1. School of Physics, University of Hyderabad, Hyderabad - 500 134, India
2. Bharat Heavy, Electricals Limited (R & D), Hyderabad - 500 539, India

Published

February 1984