Inducing Fe moment in LaFeSi with p-block element substitution

Autor: Rajiv K. Chouhan, Tyler J. Del Rose, Yaroslav Mudryk, Vitalij K. Pecharsky
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: AIP Advances, Vol 12, Iss 3, Pp 035130-035130-5 (2022)
Druh dokumentu: article
ISSN: 2158-3226
DOI: 10.1063/9.0000334
Popis: We studied the LaFeSi phase using density functional theory based full-potential linearized augmented plane wave (FP-LAPW) method. Specifically we examined the effect of p-element substitution on the stability and magnetic properties focusing on pathways to induce Fe magnetic moments. We demonstrate that either partial or complete substitutions at the Si 2c-site by several p-block elements lead to non-zero Fe moments. Our theoretical study shows that partially substituted LaFeSi1-yGay and LaFeSi1-yAly are more thermodynamically stable than the fully substituted LaFeGa and LaFeAl. We also found that the P substitutions, either partial or complete, have the most negative formation energies, however the compounds containing phosphorus are non-magnetic. Our work highlights a pathway toward manipulations of the otherwise quenched Fe-moments in LaFeSi-related compounds and help in advancing the potential magnetic functionalities of LaFeX compounds.
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