Magnetic field induced strains caused by different martensites in Ni-Mn-Ga alloys

V.A. Chernenko; P. Müllner; M. Woligarten; J. Pons; G. Kostorzl

doi:doi:10.1051/jp4:20031038

Numéro		J. Phys. IV France Volume 112, October 2003


Page(s)		951 - 954
DOI		https://doi.org/10.1051/jp4:20031038

J. Phys. IV France 112 (2003) 951
DOI: 10.1051/jp4:20031038

Magnetic field induced strains caused by different martensites in Ni-Mn-Ga alloys

V.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

Abstract
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.