J. Phys. IV France 112 (2003) 951
Magnetic field induced strains caused by different martensites in Ni-Mn-Ga alloysV.A. Chernenko1, P. Müllner2, M. Woligarten2, J. Pons3 and G. Kostorzl1
1 Institute of Magnetism, Vernadsky Str. 36-b, 03142 Kiev, Ukraine
2 ETH Zürich, Institut für Angewandte Physik, 8093 Zürich, Switzerland
3 Universitat de les Illes Balears, Departament de Fisica, Palma de Mallorca, Spain
Strains induced by magnetic fields applied at room temperature were measured for three single crystalline Ni-Mn-Ga alloys with similar magnetic properties and martensitic transformation characteristics-one containing 5-layered tetragonal martensite (alloy A), the others containing 7-layered monoclinic martensite (alloys B, C). Strains of 1.8% have been achieved in alloy A while alloys B and C showed only strains comparable to the true magnetostriction.
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