Stress-induced transformation in a Ni-Mn-In alloy and the concomitant change of resistivity

• Main Authors: Kokorin V.V., Konoplyuk S.M., Dalinger A., Thürer S., Gerstein G., Mashirov A., Stetskiv Yu.P., Maier H.J.
• Format: Article
• Language: English
• Published: EDP Sciences 2015-01-01
• Series: MATEC Web of Conferences
• Online Access: http://dx.doi.org/10.1051/matecconf/20153305007

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.