Abstract
Structure, hyperfine interactions, and magnetic behaviour of Fe80M7Cu1B12 (M=Mo, Nb, Ti) nanocrystalline alloys are studied by Mossbauer spectrometry. As-quenched and heat-treated specimens are investigated. Transmission and Conversion Electron Mossbauer effect techniques are used to compare surface and bulk crystallization as a function of annealing temperature with the aim to unveil the crystallization onset. In addition, magnetic structure comprising distributions of hyperfine fields is discussed as a function of composition and annealing temperature. Hyperfine field distributions are obtained separately for the amorphous residual phase and for interface regions. Crystalline phases are represented by discrete components.
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