Universidad Complutense de Madrid
E-Prints Complutense

Ferromagnetism in transparent thin films of MgO

Impacto

Descargas

Último año

Martínez-Boubeta, C. y Beltrán Finez, Juan Ignacio y Balcells, Ll. y Konstantinović, Z. y Valencia, S. y Schmitz, D. y Arbiol, J. y Estrade, S. y Cornil, J. y Martínez, B. (2010) Ferromagnetism in transparent thin films of MgO. Physical review B, 82 (2). ISSN 1098-0121

[img]
Vista previa
PDF
537kB

URL Oficial: http://dx.doi.org/10.1103/PhysRevB.82.024405


URLTipo de URL
http://journals.aps.org/Editorial


Resumen

We show both theoretical and experimental evidences of the appearance of ferromagnetism in MgO thin films. First principles calculations allow predicting the possibility of the formation of a local moment in MgO, provided the existence of Mg vacancies which create holes on acceptor levels near the O 2p-dominated valence band. Magnetic measurements evidence of the existence of room-temperature ferromagnetism in MgO thin films. High-resolution transmission electron microscopy demonstrates the existence of cation vacancies in our samples. Finally, by applying the element specificity of the x-ray magnetic circular dichroism technique, we also demonstrate that the magnetic moments of the system arise from the spin polarization of the 2p electrons of oxygen atoms surrounding Mg vacancies.


Tipo de documento:Artículo
Información Adicional:

© 2010 The American Physical Society. We gratefully acknowledge financial support from the Spanish MICINN Grant No. MAT2009-08024 and Consolider-Ingenio Program Grant No. CSD2007-00041. Z. Konstantinović and C. Martínez-Boubeta are supported through the Ramón y Cajal program. We also thank A. Cebollada and V. Martínez for the careful reading of the manuscript

Palabras clave:V-center; Centers; Surface; Semiconductors; Stability; Vacancies; Defects; Oxide; TiO2.
Materias:Ciencias > Física > Electricidad
Ciencias > Física > Electrónica
Código ID:31383
Depositado:27 Jul 2015 09:28
Última Modificación:04 Aug 2015 10:55

Descargas en el último año

Sólo personal del repositorio: página de control del artículo