Mishra, S. S. and Mukhopadhyay, Semanti and Yadav, T. P. and Yadav, R. M. and Radhakrishnan, Sruthi and Vajtai, R. and Ajayan, P. M. and Mukhopadhyay, N. K. and Singh, H. K. and Srivastava, O. N. (2017) Effect of Fe substitution by Co on off-stoichiometric Ni-Fe-Co-Mn-Sn Heusler alloy ribbons. Materials Research Express, 4 (8). 086507-1-086507-11. ISSN 2053-1591

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We have synthesized Ni45Fe5-XCoXMn40Sn10 Heusler alloy with different Co doping and studied the effect on the structural and magnetic properties of Ni45Fe5-XCoXMn40Sn10 (at. X = 0,2.5,5) ribbons. X-ray diffraction, scanning and transmission electron microscopic characterization reveal the structural/microstructural features in melt-spun ribbons of different compositions. A significant transformation in the crystal structure has been observed in Fe substituted ribbons. The crystal structure changes from cubic L2(1) phase to bi-phasic 4O + L2(1) and 10M + L2(1) modulated phases for the partial and complete substitution of Fe by Co specimens respectively. Williamson-Hall analysis of x-ray diffraction data was used to compute the crystallite size and residual elastic strain. Magnetic properties and magnetic field-induced structural transformation of melt-spun alloy ribbons over a large temperature range of 10 K <= T <= 500 K were examined. Our results revealed that Fe substitution by Co causes a change in the magnetic behavior which could be ascribed to the increase in the lattice strain as well as a magnetic strain due to high antiferromagnetic fraction.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s IOP Publishing.
Subjects: Materials Science
Depositing User: Users 27 not found.
Date Deposited: 31 Aug 2018 08:39
Last Modified: 31 Aug 2018 08:39
URI: http://npl.csircentral.net/id/eprint/2664

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