Stress-induced transformation in a Ni-Mn-In alloy and the concomitant change of resistivity
1 Institute of magnetism of NASU and MESU, Vernadsky blvd., 03680, Kyiv, Ukraine
2 Institut für Werkstoffkunde (Materials Science), Leibniz Universität Hannover, An der Universität 2, D – 30823 Garbsen, Germany
3 Kotelnikov Institute of Radioengineering and Electronics of RAS, Mokhovaya 11-7, Moscow, 125009, Russia
a Corresponding author: firstname.lastname@example.org
In this work, the influence of mechanical stress on magnetic properties and electric resistance of a Ni-Mn-In alloy was studied. It is shown that compression of Ni-Mn-In polycrystalline specimens brings about a stressinduced martensitic transformation. Optical images recorded in-situ confirmed the formation of a martensitic structure during loading and back-transformation upon unloading. Unloading after deformation of specimens that had experienced compressive strains up to 6% resulted in full recovery of their resistivity and magnetic susceptibility. The sharp increase in the electric resistance caused by the stress-induced transformation opens up new possibilities for Ni-Mn-In alloys to be used as a material for sensors responding to mechanical stress.
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