Neutron diffraction studies on the Heusler alloy Ni{sub 50}Mn{sub 37}Sb{sub 13}

Journal Article · Fri Apr 01 04:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3540658· OSTI ID:21538261

Rama Rao, N V; Chelvane, J Arout; Chandrasekaran, V ^[1]; Morozkin, A V ^[2]; Lamsal, J ^[3]; Yelon, W B ^[4]; Nirmala, R ^[5]; Suresh, K G ^[6]; Malik, S K ^[7]

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1. Defence Metallurgical Research Laboratory, Hyderabad 500 058 (India)
2. Department of Chemistry, Moscow Lomonosov State University, Moscow 119992 (Russian Federation)
3. Department of Physics and Astronomy, University of Missouri-Columbia, Columbia, Missouri 65211 (United States)
4. Materials Research Center and Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri 65409 (United States)
5. Department of Physics, Indian Institute of Technology Madras, Chennai 600 036 (India)
6. Department of Physics, Indian Institute of Technology Bombay, Mumbai 400 076 (India)
7. International Institute of Physics (IIP)-UFRN, Natal, 59072-970 (Brazil)

The evolution of martensitic to austenitic transformation in Ni{sub 50}Mn{sub 37}Sb{sub 13} has been studied usingtemperature dependent neutron diffraction, thermal property, and magnetization studies. Differential scanning calorimetric studies reveal a martensitic transformation T{sub M} around 291 K. The magnetization data yield a ferromagnetic ordering temperature of 329 K in the austenitic phase and 230 K in the martensitic phase. The analysis of the powder neutron diffraction data in the temperature range of 325-12 K indicates a structural transition from a high temperature cubic L2{sub 1} type structure to an orthorhombic structure. At 270 K, both cubic and orthorhombic phases coexist. Anisotropic unit cell changes are observed at the martensitic transformation: The unit cell expands by about 1.5% along the a axis, by about 2.5% along the c axis, and compresses by about 4.28% along the b axis. Both cubic and orthorhombic phases show commensurate collinear ferromagnetic ordering with a magnetic moment of {approx}3.67 {mu}{sub B}/Mn in Mn (2a and 2f) sites.

• OSTI ID: 21538261
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 109; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ALUMINIUM ALLOYS
ANISOTROPY
ANTIMONY ALLOYS
AUSTENITIC STEELS
CALORIMETRY
CARBON ADDITIONS
COHERENT SCATTERING
COPPER ALLOYS
COPPER BASE ALLOYS
CORROSION RESISTANT ALLOYS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
FERROMAGNETIC MATERIALS
HEUSLER ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC MATERIALS
MAGNETIC MOMENTS
MAGNETIZATION
MANGANESE ALLOYS
MARTENSITIC STEELS
MATERIALS
NEUTRON DIFFRACTION
NICKEL ALLOYS
ORTHORHOMBIC LATTICES
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SCATTERING
STEELS
THERMODYNAMIC PROPERTIES
TRANSFORMATIONS
TRANSITION ELEMENT ALLOYS