Correlation between Local Structure Distortions and Martensitic Transformation in Ni-Mn-In alloys

Abstract

The local structural distortions arising as a consequence of increasing Mn content in Ni_2Mn_1+xIn_1-x (x=0, 0.3, 0.4, 0.5 and 0.6) and its effect on martensitic transformation have been studied using Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy. Using the room temperature EXAFS at the Ni and Mn K-edges in the above compositions, the changes associated with respect to the local structure of these absorbing atoms are compared. It is seen that in the alloys exhibiting martensitic transformation ($x\ge 0.4$) there is a significant difference between the Ni-In and Ni-Mn bond lengths even in the austenitic phase indicating atomic volume to be the main factor in inducing martensitic transformation in Ni-Mn-In Heusler alloys.

8 pages, 2 figures

References in corpus (4)

• Room Temperature Magnetocaloric Effect in Ni-Mn-In
• Local Atomic Structure of Martensitic Ni${}_{2+x}$Mn${}_{1-x}$Ga: An EXAFS Study
• Factors influencing the Martensitic interactions in Ni50Mn35Sn15: An EXAFS study
• Local atomic arrangement and martensitic transformation in Ni${}_{50}$Mn${}_{35}$In${}_{15}$: An EXAFS Study

Cited by in corpus (7)

• Antiferromagnetic Exchange Interactions in Ni${}_2$Mn${}_{1.4}$In${}_{0.6}$ ferromagnetic Heusler alloy
• Role of Ni-Mn hybridization in magnetism of martensitic state of Ni-Mn-In shape memory alloys
• Ferromagnetic interactions and martensitic transformation in Fe doped Ni-Mn-In shape memory alloys
• Randomly packed Ni${}_2$MnIn and NiMn structural units in off stoichiometric Ni${}_2$Mn${}_{2-y}$In${}_y$ alloys
• Magnetic interactions in the Martensitic phase of Mn rich Ni-Mn-In shape memory alloys
• Lattice strain accommodation and absence of pre-transition phases in Ni${}_{50}$Mn${}_{25+x}$In${}_{25-x}$
• Effect of site occupancy disorder on Martensitic properties of Mn${}_2$NiIn type alloys: x-ray absorption fine structure study