Magnetism of CoFe$_2$O$_4$ ultrathin films on MgAl$_2$O$_4$ driven by epitaxial strain - CEA - Commissariat à l’énergie atomique et aux énergies alternatives Access content directly
Journal Articles Applied Physics Letters Year : 2013

Magnetism of CoFe$_2$O$_4$ ultrathin films on MgAl$_2$O$_4$ driven by epitaxial strain

Abstract

We report on the correlations between magnetic anisotropy and strain state in CoFe$_2$O$_4$ ultrathin films grown on MgAl$_2$O$_4$(100) and MgAl$_2$O$_4$(111) substrates. By local strain analysis using the geometric phase method, a significant in-plane compressive strain is observed for the (001) orientation while a full relaxation is detected for the (111) orientation. The relaxation process in CoFe$_2$O$_4$(111) layers induces interface dislocations and a large amount of antiphase boundaries while a pseudomorphic growth is observed for the (001) direction, decreasing significantly the density of antiphase boundaries. By comparing the magnetoelastic energy terms, the correlation between strain state and resultant magnetization is discussed.
Fichier principal
Vignette du fichier
P45-APL 2013.pdf (1.53 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

cea-01481038 , version 1 (13-02-2018)

Identifiers

Cite

Christophe Gatel, Bénédicte Warot-Fonrose, S. Matzen, J.-B. Moussy. Magnetism of CoFe$_2$O$_4$ ultrathin films on MgAl$_2$O$_4$ driven by epitaxial strain. Applied Physics Letters, 2013, 103, pp.092405. ⟨10.1063/1.4819178⟩. ⟨cea-01481038⟩
128 View
240 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More