Orientation dependence of the shape memory effect and superelasticity in Co49Ni21Ga30 ferromagnetic single crystals
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A study was conducted to investigate the effect of the orientation dependence of the shape memory and superelasticity in Co49Ni 21Ga30 ferromagnetic single crystals. The Co 49Ni21Ga30 single crystals were grown by the Bridgman method. The shape memory effect, superelasticity, and temperature dependence for these single crystals were investigated, without heat treatment. It was also demonstrated by the diffraction microscopy method that the Co 49Ni21Ga30 ferromagnetic single crystals were in the high phase, in the state after growth that were transformed to martensite state after cooling. The transformation for the martensitic transformation was also measured from the shape memory effect. It was observed that the orientation dependence of strain for the first stage of martensitic transformation coincided with the second stage of martensitic transformation.