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Magnetic anisotropy and the shape memory phase transition in Ni52Mn26Ga22

Mellors, NJ, Lord, JS, Robertson, S, Faunce, CA, Grundy, PJ, Lord, DG, Donnier-Valentin, G and Cugat, O 2004, 'Magnetic anisotropy and the shape memory phase transition in Ni52Mn26Ga22' , Journal of Magnetism and Magnetic Materials, 272-276 (3) , pp. 2108-2110.

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Abstract

Torque measurements of magnetocrystalline anisotropy energies, made on (1 0 0) and (1 1 0) oriented planar disc samples of the shape memory alloy Ni52Mn26Ga22 as a function of temperature and applied directional field cooling are reported. The results confirm small values for the anisotropy constants in the austenite phase (Phys. Rev. B 65 (2002) 134422). Optical observations reveal the influence of applied stresses and magnetic fields on the mobility of the phase transition and twin boundaries. Lorentz mode TEM observations from a (1 1 0) planar foil reveal the interactions between magnetic and anti-phase domain boundaries as the specimen is thermally cycled through the transition temperature.

Item Type: Article
Uncontrolled Keywords: Magnetic shape memory; Ni2MnGa
Themes: Subjects / Themes > Q Science > QC Physics
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
Journal or Publication Title: Journal of Magnetism and Magnetic Materials
Publisher: Elsevier
Refereed: Yes
ISSN: 03048853
Depositing User: H Kenna
Date Deposited: 22 Aug 2007 15:48
Last Modified: 20 Aug 2013 16:46
URI: http://usir.salford.ac.uk/id/eprint/317

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