Effect of Gd doping and O deficiency on the Curie temperature of EuO

The effect of Gd doping and O deficiency on the electronic structure, exchange interaction, and Curie temperature of EuO in the cubic and tetragonal phases is studied by means of density functional theory. For both defects, the Curie temperature is found to exhibit a distinct maximum as a function o...

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Detalles Bibliográficos
Autores principales: Jutong, Nuttachai, Eckern, Ulrich, Mairoser, Thomas, Schwingenschlögl, Udo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4306962/
https://www.ncbi.nlm.nih.gov/pubmed/25623623
http://dx.doi.org/10.1038/srep08038
Descripción
Sumario:The effect of Gd doping and O deficiency on the electronic structure, exchange interaction, and Curie temperature of EuO in the cubic and tetragonal phases is studied by means of density functional theory. For both defects, the Curie temperature is found to exhibit a distinct maximum as a function of the defect concentration. The existence of optimal defect concentrations is explained by the interplay of the on-site, RKKY, and superexchange contributions to the magnetism.

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