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Título:
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Ferromagnetism in transparent thin films of MgO
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Autores:
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Martínez-Boubeta, C. ;
Beltrán Finez, Juan Ignacio ;
Balcells, Ll. ;
Konstantinovi?, Z. ;
Valencia, S. ;
Schmitz, D. ;
Arbiol, J. ;
Estrade, S. ;
Cornil, J. ;
Martínez, B.
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2010-07-08
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Electricidad
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Materia = Ciencias: Física: Electrónica
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Tipo = Artículo
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Resumen:
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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.
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En línea:
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https://eprints.ucm.es/id/eprint/31383/1/BeltranFinez%20JI%2007%20LIBRE.pdf
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