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Balcells, Ll. ; Beltrán Finez, Juan Ignacio ; Martínez-Boubeta, C. ; Konstantinovi?, Z. ; Arbiol, J. ; Martínez, B. | American Institute of Physics | 2010-12-20In this work we report on the magnetic behavior of MgO thin films prepared by sputtering. A severe aging process of the ferromagnetic properties is detected in magnetic samples exposed to ambient atmosphere. However, ferromagnetism can be succes[...]texto impreso
Martínez-Boubeta, C. ; Beltrán Finez, Juan Ignacio ; Balcells, Ll. ; Konstantinovi?, Z. ; Valencia, S. ; Schmitz, D. ; Arbiol, J. ; Estrade, S. ; Cornil, J. ; Martínez, B. | American Physical Society | 2010-07-08We 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 vac[...]texto impreso
Galceran, R. ; Balcells, Ll. ; Martínez-Boubeta, C. ; Bozzo, B. ; Cisneros-Fernández, J. ; Mata, M. de la ; Magén, C. ; Arbiol, J. ; Tornos, J. ; Cuéllar Jiménez, Fabián Andrés ; Sefrioui, Zouhair ; Cebollada, A. ; Golmar, F. ; Huesos, L.E. ; Casanova, F. ; Santamaría Sánchez-Barriga, Jacobo ; Martínez, B. | American Physical Society | 2015-09-16We report on magnetotransport properties on La_(0.7)Sr_(0.3)MnO_(3)/MgO/Fe tunnel junctions grown epitaxially on top of (001)-oriented SrTiO_(3) substrates by sputtering. It is shown that the magnetoresistive response depends critically on the M[...]
