Aging of magnetic properties in MgO films | Zendy

Ll. Balcells | Zendy; Juan I. Beltrán | Zendy; C. Martínez-Boubeta | Zendy; Z. Konstantinović | Zendy; Jordi Arbiol | Zendy; B. Martı́nez | Zendy

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Aging of magnetic properties in MgO films

Author(s) -

Ll. Balcells,

Juan I. Beltrán,

C. Martínez-Boubeta,

Z. Konstantinović,

Jordi Arbiol,

B. Martı́nez

Publication year - 2010

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3527963

Subject(s) - ferromagnetism , annealing (glass) , materials science , sputtering , thin film , condensed matter physics , hydrogen , iron alloys , instability , metallurgy , nanotechnology , chemistry , physics , organic chemistry , mechanics

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

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