Abstract
The results of experimental investigations of the crystal structure and magnetization of the magnetic shape memory alloy Ni2Mn1.48Sn0.52 are reported. This alloy undergoes the martensitic transition from the cubic L21-type structure to the orthorhombic 4O-type one with decreasing temperature. The Curie temperature TCA in the austenite phase is 310 K. The magnetic state just below the martensitic transition temperature TM is the low magnetization state or something like that. With further decrease of temperature, this alloy regains the ferromagnetism. The unit cell volume contracts discontinuously at TM with decreasing temperature. The percentage of the volume change was estimated to be ∼0.7%. The nearest neighbor Ni–Mn and Mn–Mn distances in both austenite and martensite phases of Ni2Mn1.48Sn0.52 were estimated using the X-ray diffraction analysis. On the basis of the experimental results, the magnetic properties of Ni2Mn1.48Sn0.52 are discussed.
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