Abstract
Extended X-ray Absorption Fine Structure (EXAFS) studies on Ni50Mn25+xIn25−x have been carried out at the Ni and Mn K-edge as a function of temperature. Thermal evolution of nearest-neighbor Ni-Mn and Mn-Mn bond distances in the martensitic phase gives a clear evidence of a close relation between structural and magnetic degrees of freedom in these alloys. In particular, the study highlights the role of Ni 3d-Mn 3d hybridization in the magnetism of the martensitic phase of these alloys.
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