Physics – Condensed Matter – Materials Science
Scientific paper
2010-05-26
Appl. Phys. Lett, 96 (2010)
Physics
Condensed Matter
Materials Science
8 pages, 2 figures
Scientific paper
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.
Bhobe P. A.
Emura S.
Krishnamurthy D.
Lobo D. N.
Priolkar K. R.
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