Effect of Site Disorder on Martensitic Transformation in Ferromagnetic Ni55Fe20Al25 Alloy as Inferred from Magnetic and Magneto-Transport Measurements

Abstract:

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Neutron diffraction technique is used to identify the crystal structures and study the phase transformation in a ternary Ni55Fe20Al25 alloy, prepared in the ordered and site-disordered states by annealing and rapid-melt-quenching techniques. We report the observation of ‘step-like’ wavy structures in the thermomagnetic curves taken on ordered samples. No such features are observed in the site-disordered counterparts. Negative magnetoresistance at 10 K and in a magnetic field of 80 kOe in the disordered sample is nearly two times larger than that in the annealed sample. A tentative explanation for these phenomena is given.

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Periodical:

Edited by:

Lluis Mañosa, P.K. Mukhopadhyay and S.R. Barman

Pages:

77-84

DOI:

10.4028/www.scientific.net/AMR.52.77

Citation:

A.C. Abhyankar et al., "Effect of Site Disorder on Martensitic Transformation in Ferromagnetic Ni55Fe20Al25 Alloy as Inferred from Magnetic and Magneto-Transport Measurements", Advanced Materials Research, Vol. 52, pp. 77-84, 2008

Online since:

June 2008

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$35.00

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