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https://hdl.handle.net/2445/33086
Title: | Ferromagnetism in transparent thin films of MgO |
Author: | 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 |
Keywords: | Pel·lícules fines Ferromagnetisme Òxid de magnesi Espintrònica Thin films Ferromagnetism Magnesium oxide Spintronics |
Issue Date: | 2010 |
Publisher: | American Physical Society |
Abstract: | 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. |
It is part of: | Physical Review B, 2010, vol. 82, p. 024405-1-024405-7 |
URI: | https://hdl.handle.net/2445/33086 |
ISSN: | 1098-0121 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) |
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