Abstract

X-ray powder diffraction and magnetization measurements were done on the magnetic shape memory alloys Ni 2Mn 1+ x In 1− x . On the basis of the results, the magnetic phase diagram was determined for Ni 2Mn 1+ x In 1 −x alloys. Magnetization measurements make clear that the excess Mn atoms, which substitute for In sites, are coupled ferromagnetically to the ferromagnetic manganese sublattices. A magnetic phase diagram of Ni 2Mn 1+ x In 1− x alloys is discussed qualitatively on the basis of the interatomic dependence of the exchange interactions.

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