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Aging of magnetic properties in MgO films

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Balcells, Ll. and Beltrán Finez, Juan Ignacio and Martínez-Boubeta, C. and Konstantinović, Z. and Arbiol, J. and Martínez, B. (2010) Aging of magnetic properties in MgO films. Applied physics letters, 97 (25). ISSN 0003-6951

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Official URL: http://dx.doi.org/10.1063/1.3527963


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Abstract

In 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 successively switched on again by annealing samples in vacuum. We suggest this behavior reflects the key role played by defects in stabilizing ferromagnetism in MgO films and is likely to be closely related to the hydrogen-driven instability of V-type centers in this material.


Item Type:Article
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© 2010 American Institute of Physics. We acknowledge financial support from Spanish MICINN Grant No. MAT2009-08024, Consolider-Ingenio Grant No. CSD2007-00041, and NanoAraCat. C.M.B. and Z.K. grant financial support through the Ramón y Cajal program. J.A. also acknowledges LMA advanced microscopy laboratory at INA for the use of advanced Cs-corrected electron microscopes.

Uncontrolled Keywords:Low-coordination; Thin-films; Surface; Oxide; Ferromagnetism; Temperature; Growth; Sites; Water.
Subjects:Sciences > Physics > Electricity
Sciences > Physics > Electronics
ID Code:31380
Deposited On:27 Jul 2015 08:06
Last Modified:10 Dec 2018 14:58

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