Pressure dependence of half metallic behavior of Co{sub 2}VZ (Z=Si, Ge)-An ab initio Study

Journal Article · Thu Apr 24 00:00:00 EDT 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4872979· OSTI ID:22269323

Kumar, Ranjan ^[1]

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1. Department of Physics, Panjab University, Chandigarh-160014 (India)

The structural, electronic and magnetic properties of Co-based Heusler compounds Co{sub 2}VZ (Z=Si, Ge) under pressure are studied using first-principles density functional theory. The total magnetic moment decreases on compression. Under application of external pressure, the valence band and conduction band are shifted downward which leads to modification of electronic structure. True half metallic to nearly half metallic transition is observed at 30 GPa, 50 GPa for Co{sub 2}VSi and Co{sub 2}VGe respectively. Around 100 GPa, Co{sub 2}VGe shows complete metallic behavior. The half metal to metal transition is accompanied by quenching of magnetic moment.

• OSTI ID: 22269323
• Journal Information: AIP Conference Proceedings, Vol. 1591, Issue 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; 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
DENSITY FUNCTIONAL METHOD
ELECTRONIC STRUCTURE
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
PRESSURE DEPENDENCE
QUENCHING