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Magnetic Interactions in Amorphous and Nanocrystalline Fe90Zr7Cu1B2 Alloy

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Abstract

Magnetic interactions and microstructure in the amorphous and nanocrystalline Fe90Zr7Cu1B2 alloy were investigated. These studies were carried out in the temperature range from 140 up to 380 K, using a Mössbauer spectrometer and completely automated set-up for measurements of magnetic properties. It has been found that the Curie temperature and quadrupole splitting decrease after annealing the sample at 573 K for 1 h (invar effect). However, this behaviour is not observed in nanocrystalline samples. In the early stages of crystallization (the volume fraction of the crystalline phase equal to about 0.06) α-Fe grains above the Curie temperature of amorphous matrix may be treated as non-interacting particles. The particle size estimated by Mössbauer spectra and magnetization curve analysis is equal to about 4 nm.

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  1. Institute of Physics, Technical University of Częstochowa, ul. Armii Krajowej 19, 42-200, Częstochowa, Poland

    J. Olszewski

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Olszewski, J. Magnetic Interactions in Amorphous and Nanocrystalline Fe90Zr7Cu1B2 Alloy. Hyperfine Interactions 131, 83–90 (2000). https://doi.org/10.1023/A:1010908521903

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