Atomic scale understanding of magnetic properties in Ni50Fe35Co15

Mössbauer spectroscopic studies have been carried out at different temperatures across ferromagnetic to paramagnetic transition in Ni50Fe35Co15 and the evolution of hyperfine parameters such as centre shift and magnetic hyperfine fields with temperature has been studied. Mössbauer spectrum obtained...

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Bibliographic Details
Published in:AIP advances 2016-02, Vol.6 (2), p.025005-025005-9
Main Authors: Herojit Singh, L., Govindaraj, R., Ravishankar, C., Rajagopalan, S., Amarendra, G.
Format: Article
Language:English
Subjects:
Crystal structure
Ferromagnetism
Hyperfine structure
Magnetic properties
Magnetism
Matching
Specific heat
Thermal stability
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Summary:Mössbauer spectroscopic studies have been carried out at different temperatures across ferromagnetic to paramagnetic transition in Ni50Fe35Co15 and the evolution of hyperfine parameters such as centre shift and magnetic hyperfine fields with temperature has been studied. Mössbauer spectrum obtained at 300 K in Ni50Fe35Co15 exhibiting fcc crystal structure is a six line pattern with the mean value of the hyperfine field close to 33 Tesla. Ferromagnetic to paramagnetic transition has been observed to occur in this system around 895 K matching with that of magnetization results. Debye temperature of this nickel rich alloy is deduced to be around 470 K matching with that of Ni. Effect of prolonged annealing at 750 K on the magnetic property is also investigated with respect to the thermal stability of the alloy .
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4940756