Compressibility Anomaly in Magnetic Heuslar Alloy Ni{sub 2}MnGa and Co{sub 2}FeSi

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3605776· OSTI ID:21608138

Garg, Alka B; Vijayakumar, V ^[1]

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1. High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India)

Results of synchrotron based high pressure x ray diffraction measurements on Heuslar alloys Ni{sub 2}MnGa and Co{sub 2}FeSi are reported up to 30.6 and 24.6 GPa respectively. Pressure volume data for Ni{sub 2}MnGa shows normal compressibility behaviour up to 30.6 GPa with the value of bulk modulus Bo and its pressure derivative B' as 130 GPa and 4.97 respectively. In case of Co{sub 2}FeSi, the P-V data shows normal behaviour upto 5 Gpa and hereafter linear P-V relation. The estimated ambient pressure compressibility based on data up to 5 GPa is 267 GPa (with B' = 4). The fit to linear P-V data above 5 GPa yields a compressibility of 279.5.

• OSTI ID: 21608138
• Journal Information: AIP Conference Proceedings, Vol. 1349, Issue 1; Conference: 55. DAE solid state physics symposium 2010, Manipal (India), 26-30 Dec 2010; Other Information: DOI: 10.1063/1.3605776; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
CALCIUM
COBALT
COMPRESSIBILITY
FERROMAGNETIC MATERIALS
INTERMETALLIC COMPOUNDS
IRON
MANGANESE
NICKEL
NICKEL ALLOYS
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
PRESSURE RANGE MEGA PA 10-100
SILICON
X-RAY DIFFRACTION
ALKALINE EARTH METALS
ALLOYS
COHERENT SCATTERING
DIFFRACTION
ELEMENTS
MAGNETIC MATERIALS
MATERIALS
MECHANICAL PROPERTIES
METALS
PRESSURE RANGE
PRESSURE RANGE MEGA PA
SCATTERING
SEMIMETALS
TRANSITION ELEMENT ALLOYS
TRANSITION ELEMENTS