Affiliations: [a] Low Temperature Physics Department, Moscow State
University, 119899 Moscow, Russia | [b] Institute of Physical Metallurgy, Central Research
Institute for Ferrous Metallurgy, 107005 Moscow, Russia | [c] Institute of Fluid Science, Tohoku University,
Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan | [d] Institute of Multidisciplinary Research for Advanced
Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577,
Japan
Abstract: A study of polycrystalline and single crystalline
Ni_{2+X}Mn_{1-X}Ga alloys by means of
dilatometric and strain gage techniques shows that large strain can be induced
in the temperature range of the martensitic transformation by application of an
external magnetic field. The biggest strain induced by magnetic field was
observed in the samples of chemical compositions where the structural and
magnetic transitions couple, i.e. occur at the same temperature.
