CoMnCrGa: a novel ferromagnetic material with high spin-polarization for room temperature spintronics - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Materials Chemistry C Année : 2023

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

Résumé

Here, 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 (B807 K), low magnetic moment and very high spinpolarization, the compound is a promising candidate for room temperature spintronics applications.

Domaines

Matériaux
Fichier principal
Vignette du fichier
CoMnCrGa_Final_Submission.pdf (7.45 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04313220 , version 1 (29-11-2023)

Identifiants

Citer

Shuvankar Gupta, Sudip Chakraborty, Vidha Bhasin, Santanu Pakhira, Shovan Dan, et al.. CoMnCrGa: a novel ferromagnetic material with high spin-polarization for room temperature spintronics. Journal of Materials Chemistry C, 2023, 11 (44), pp.15489-15499. ⟨10.1039/d3tc02813e⟩. ⟨hal-04313220⟩
18 Consultations
9 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More