Local atomic arrangement and martensitic transformation in Ni50Mn35In15:: an EXAFS study

被引：23

作者：

Bhobe, P. A.

Priolkar, K. R.

Sarode, P. R.

机构：

[1] Department of Physics, Goa University

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2008年 / 41卷 / 04期

关键词：

Bond length - Electronic properties - Indium compounds - Magnetic properties - Magnetoresistance - Manganese compounds - Martensitic transformations;

D O I：

10.1088/0022-3727/41/4/045004

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ni50Mn35In15 is a newly found ferromagnetic shape memory alloy that displays exotic properties such as inverse magnetocaloric effect and large magnetoresistance at moderate field values. Since the Mn content in this compound is more than the stoichiometric (X(2)YZ) Heusler composition, the magnetic and electronic properties of this material are decided to a large extent by the distribution of constituent atoms in the available sites. In this work, we present extended x-ray absorption fine structure (EXAFS) measurements on the bulk Ni50Mn35In15 which reveal the local structural change that occurs upon phase transformation. The change in the bond lengths between different atomic species helps in understanding the types of interactions which are responsible for driving such Ni-Mn based systems towards martensitic transformation.

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页数：6

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