Electronic band structure and magnetism of CoFeV0.5Mn0.5Si

Kharel, Parashu; Baker, Gavin; Flesche, Matthew; Ramker, Adam; Moua, Young; Valloppilly, Shah; Shand, Paul M.; Lukashev, Pavel V.

doi:10.1063/9.0000252

Title: Electronic band structure and magnetism of CoFeV_0.5Mn_0.5Si

Journal Article · 08 March 2022 · AIP Advances

DOI: https://doi.org/10.1063/9.0000252 · OSTI ID:1982393

^[1]; Baker, Gavin ^[1]; Flesche, Matthew ^[1]; Ramker, Adam ^[2]; Moua, Young ^[2];

^[3];

^[2];

^[2]

South Dakota State University, Brookings, SD (United States)
University of Northern Iowa, Cedar Falls, IA (United States)
University of Nebraska, Lincoln, NE (United States)

Half-metallic Heusler alloys have attracted significant attention due to their potential application in spin-transport-based devices. We have synthesized one such alloy, CoFeV_0.5Mn_0.5Si, using arc melting and high-vacuum annealing at 600 °C for 24 hours. First principles calculation indicates that CoFeV_0.5Mn_0.5Si shows a nearly half-metallic band structure with a degree of spin polarization of about 93%. In addition, this value can be enhanced by the application of tensile strain. The room temperature x-ray diffraction patterns are indexed with the cubic crystal structure without secondary phases. The annealed sample shows ferromagnetic order with the Curie temperature well above room temperature ( T_c = 657 K) and a saturation magnetization of about 92 emu/g. Our results indicate that CoFeV_0.5Mn_0.5Si has a potential for room temperature spin-transport-based devices.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN); South Dakota State University, Brookings, SD (United States); University of Northern Iowa, Cedar Falls, IA (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC)

Grant/Contract Number:: SC0012704

OSTI ID:: 1982393

Journal Information:: AIP Advances, Journal Name: AIP Advances Journal Issue: 3 Vol. 12; ISSN 2158-3226

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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