Journal
PHYSICA SCRIPTA
Volume 97, Issue 11, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1402-4896/ac96d7
Keywords
spinels; ferromagnetism; thermoelectric; behaviour; thiospinels; MgFe2(S; Se)(4)
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Funding
- Taif University, Taif, Saudi Arabia [TURSP-2020/200]
- Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia [PNURSP2022R29]
- King Khalid University [R. G. P. 2/6/43]
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This study comprehensively analyzes the electronic, ferromagnetic, and thermoelectric characteristics of magnesium-based spinel chalcogenides. The research findings indicate that the ferromagnetism is due to the exchange of electron spins instead of the clustering effect of internal magnetic atoms.
Magnesium-based spinel chalcogenides are remarkable materials for spintronic and energy harvesting applications. Therefore, the electronic, ferromagnetism, and thermoelectric characteristics of MgFe2(S/Se)(4) spinels are addressed comprehensively by modified Becke Johnson potential (TB-mBJ). The stability of cubic phase has been illustrated by formation energy and energy released during optimization. The Curie temperature and spin polarization have been calculated by Heisenberg model and density of states at Fermi level. Ferromagnetism has been studied by exchange energies, double exchange mechanism, exchange constants, and hybridization process. The reduction of magnetic moment of Fe and its shifting on nonmagnetic (Mg, S/Se) sites shows the ferromagnetism is due to the exchange of electrons spin rather than the clustering effect of internal magnetic of Fe atoms in the structure. Moreover, thermoelectric analysis of studied spinels has been illustrated by electrical and thermal conductivities, Seebeck coefficient (S), and power factor.
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