J. Phys. IV France
Volume 115, June 2004
Page(s) 95 - 103

J. Phys. IV France
115 (2004) 95
DOI: 10.1051/jp4:2004115012

Magneto-mechanical cycling and modeling the external stress effect on the magnetic-field-controlled strain response in Ni-Mn-Ga

A.A. Likhachev, A. Sozinov and K. Ullakko

Helsinki University of Technology, Dept. of Engineering Physics and Mathematics, Rakentajankio 2C, 02150 Espoo, Finland

Present publication gives a detailed theoretical concept and also presents the relevant experimental results concerning the effect of the constant external stress on the magnetic-field-controlled strain response during the cycling in magnetic field in Ni-Mn-Ga. We also discuss the physical mechanism of this effect using our latest model developments. Simultaneously we give the most important information about the main structural, magnetic and mechanical properties related to a family of non-stoichiometric Ni-Mn-Ga alloys having three different type of martensite crystal structures.

© EDP Sciences 2004