Abhyankar, A. C. ; Annie D'Santhoshini, B. ; Kaul, S. N. ; Nigam, A. K. (2008) Effect of site disorder on martensitic transformation in ferromagnetic Ni55Fe20Al25 alloy as inferred from magnetic and magneto-transport measurements Advanced Materials Research, 52 . pp. 77-84. ISSN 1022-6680
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Official URL: http://www.scientific.net/AMR.52.77
Related URL: http://dx.doi.org/10.4028/www.scientific.net/AMR.52.77
Abstract
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Trans Tech Publications Inc. |
| Keywords: | Martensitic Phase Transition; Ferromagnetic Shape Memory Alloys; Magnetization; Magnetoresistance; Itinerant- electron Magenetism |
| ID Code: | 29869 |
| Deposited On: | 23 Dec 2010 04:12 |
| Last Modified: | 06 Jun 2011 08:53 |
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