CoMnCrGa: a novel ferromagnetic material with high spin-polarization for room temperature spintronics

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dc.contributor.authorGupta, Sen_AU
dc.contributor.authorChakraborty, Sen_AU
dc.contributor.authorBhasin, Ven_AU
dc.contributor.authorPakhira, Sen_AU
dc.contributor.authorDan, Sen_AU
dc.contributor.authorBarreteau, Cen_AU
dc.contributor.authorCrivello, JCen_AU
dc.contributor.authorJha, SNen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorBhattacharyya, Den_AU
dc.contributor.authorPaul-Boncour, Ven_AU
dc.contributor.authorMazumdar, Cen_AU
dc.date.accessioned2024-12-05T21:23:41Zen_AU
dc.date.available2024-12-05T21:23:41Zen_AU
dc.date.issued2023-10-17en_AU
dc.date.statistics2024-07-31en_AU
dc.description.abstractHere, we report the synthesis of a novel quaternary Heusler alloy CoMnCrGa and its structural, magnetic, transport and electronic properties using both experimental and theoretical methods. DFT calculations on an ordered crystal structure with specific atomic positions (Ga at 4a, Mn at 4b, Cr at 4c and Co at 4d) reveal a half-metallic ferromagnetic (HMF) ground state having a very high spin polarization of 96.1%. In this work we show that despite having a mix of Mn (4b) and Cr (4c) atoms, CoMnCrGa exhibits all the signatures of the HMF characteristic, viz., adherence to the Slater–Pauling (S–P) rule to isothermal saturation magnetization and the absence of magnon scattering in temperature dependent resistivity data. Given its high TC (∼807 K), low magnetic moment and very high spin-polarization, the compound is a promising candidate for room temperature spintronics applications. © Royal Society of Chemistry 2024.en_AU
dc.description.sponsorshipS. G. and S. C. would like to sincerely acknowledge SINP, India and UGC, India, respectively, for their fellowship. The authors would like to sincerely thank Prof. Biswarup Satpati, SINP, for the TEM & EDX measurements. DFT calculations were performed using HPC resources from GENCI-CINES (grant 2021-A0100906175). Work at the Ames National Laboratory (in part) was supported by the Department of Energy-Basic Energy Sciences, Materials Sciences and Engineering Division, under contract no. DE-AC02-07CH11358.en_AU
dc.identifier.citationGupta, S., Chakraborty, S., Bhasin, V., Pakhira, S., Dan, S., Barreteau, C., Crivello, J.-C., Jha, S. N., Avdeev, M., Bhattacharyya, D., Paul-Boncour, V., & Mazumdar, C. (2023). CoMnCrGa: a novel ferromagnetic material with high spin-polarization for room temperature spintronics. Journal of Materials Chemistry C, 11(44), 15489-15499. doi.org/10.1039/D3TC02813Een_AU
dc.identifier.issn2050-7526en_AU
dc.identifier.issn2050-7534en_AU
dc.identifier.issue44en_AU
dc.identifier.journaltitleJournal of Materials Chemistry Cen_AU
dc.identifier.pagination15489-15499en_AU
dc.identifier.urihttps://doi.org/10.1039/d3tc02813een_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15780en_AU
dc.identifier.volume11en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherRoyal Society of Chemistryen_AU
dc.subjectFerromagnetic materialsen_AU
dc.subjectPolarizationen_AU
dc.subjectTemperature rangeen_AU
dc.subjectGalliumen_AU
dc.subjectChromiumen_AU
dc.subjectManganeseen_AU
dc.subjectCobalten_AU
dc.subjectSynthesisen_AU
dc.subjectHeusler alloysen_AU
dc.subjectCrystal structureen_AU
dc.subjectFerromagnetismen_AU
dc.titleCoMnCrGa: a novel ferromagnetic material with high spin-polarization for room temperature spintronicsen_AU
dc.typeJournal Articleen_AU
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