Título:
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Ferromagnetism in transparent thin films of MgO
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Autor/a:
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Martínez Boubeta, José Carlos; Beltrán, J. I.; Balcells i Argemí, Lluís; Konstantinović, Zorica; Valencia, S.; Schmitz, D.; Arbiol i Cobos, Jordi; Estradé Albiol, Sònia; Cornil, J.; Martínez Perea, Benjamin
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Otros autores:
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Universitat de Barcelona |
Abstract:
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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. |
Materia(s):
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-Pel·lícules fines -Ferromagnetisme -Òxid de magnesi -Espintrònica -Thin films -Ferromagnetism -Magnesium oxide -Spintronics |
Derechos:
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(c) American Physical Society, 2010
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Tipo de documento:
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Artículo Artículo - Versión publicada |
Editor:
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American Physical Society
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