Physics – Condensed Matter – Materials Science
Scientific paper
2000-05-24
Physics
Condensed Matter
Materials Science
6 pages, 9 Postscript figures, submitted to Phys.Lett. A
Scientific paper
10.1016/S0375-9601(00)00561-2
Recently, several research groups have reported on the observation of super-large more than 5% magneto-strain effect in some non-stoichiometric Ni-Mn-Ga alloys close to 5.78% value expected from the tetragonality aspect ratio of the martensite crystal lattice. New Ni-Mn-Ga alloys showing giant magneto-strain effect display simultaneously few interesting physical effects and new behavior for some magnetic and mechanical properties which is very different from that earlier observed in Ni-Mn-Ga showing lower magneto-strain effect. This report represents some new experimental results and the quantitative model describing large magneto-strain effect and main mechanical and magnetic properties observed in several ferromagnetic shape-memory alloys. The model application to giant magneto-strain effect recently found in some non-stoichiometric Ni-Mn-Ga alloys is discussed.
Likhachev A. A.
Ullakko K.
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