Artículo
Strain-induced magnetic transition in CaMn O3 ultrathin films
Lopez Pedroso, Agustin Gabriel
; Barral, María Andrea
; Graf, Mónica Elisabet
; Llois, Ana Maria
; Aguirre, M. H.; Steren, Laura Beatriz
; Di Napoli, Solange Mariel
Fecha de publicación:
08/2020
Editorial:
American Physical Society
Revista:
Physical Review B: Condensed Matter and Materials Physics
ISSN:
2469-9969
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The effect of high tensile strain and low dimensionality on the magnetic and electronic properties of CaMnO3 ultrathin films, epitaxially grown on SrTiO3 substrates, are experimentally studied and theoretically analyzed. By means of ab initio calculations, we find that both the high strain produced by the substrate and the presence of the free surface contribute to the stabilization of an in-plane ferromagnetic coupling, giving rise to a nonzero net magnetic moment in the ultrathin films. Coupled with this change in the magnetic order we find an insulatormetal transition triggered by the quantum confinement and the tensile epitaxial strain. Accordingly, our magnetic measurements in 3-nm ultrathin films show a ferromagnetic hysteresis loop, absent in the bulk compound due to its G-type antiferromagnetic structure.
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Articulos (UE-INN - NODO CONSTITUYENTES)
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO CONSTITUYENTES
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO CONSTITUYENTES
Citación
Lopez Pedroso, Agustin Gabriel; Barral, María Andrea; Graf, Mónica Elisabet; Llois, Ana Maria; Aguirre, M. H.; et al.; Strain-induced magnetic transition in CaMn O3 ultrathin films; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 102; 8; 8-2020; 085432
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