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Ferromagnetic resonance linewidth reduction in Fe/Au multilayers using ion beams.

Bilzer, C. and Devolder, T. and Chappert, C. and Plantevin, O. and Suszka, A.K. and Hickey, B.J. and Lamperti, A. and Tanner, B.K. and Mahrov, B. and Demokritov, S.O. (2008) 'Ferromagnetic resonance linewidth reduction in Fe/Au multilayers using ion beams.', Journal of applied physics., 103 (7). 07B518.

Abstract

In order to optimize their magnetic properties, Fe/Au multilayers were treated by pregrowth and postgrowth ion-beam bombardments. The ferromagnetic resonance linewidth was used as our main figure of merit. The pregrowth treatment of the MgO substrate using a 60 eV atomic oxygen beam resulted in a reduction of the inhomogeneous linewidth broadening in comparison with a sample grown on an untreated substrate. This homogeneity increase is linked to the removal of substrate carbon contamination by the chemically active oxygen. It correlates with the reduced interface roughness. The postgrowth sample irradiation using 30 keV He+ ions also reduces the inhomogeneous broadening in the linewidth. Fe and Au have a miscibility gap, but the demixing is kinetically quenched at room temperature. Ion collisions locally minimize the interface energy by providing the energy necessary for localized demixing, resulting in a smoothing effect. Combined, the pregrowth and the postgrowth irradiations lead to the lowest observed linewidth.

Item Type:Article
Keywords:Ferromagnetic resonance, Gold, Interface roughness, Ion beam effects, Iron, Magnetic multilayers.
Full text:PDF - Published Version (343Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1063/1.2839266
Publisher statement:© 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Bilzer, C. and Devolder, T. and Chappert, C. and Plantevin, O. and Suszka, A.K. and Hickey, B.J. and Lamperti, A. and Tanner, B.K. and Mahrov, B. and Demokritov, S.O. (2008) 'Ferromagnetic resonance linewidth reduction in Fe/Au multilayers using ion beams.', Journal of applied physics., 103 (7). 07B518 and may be found at http://dx.doi.org/10.1063/1.2839266
Record Created:29 Oct 2012 16:35
Last Modified:10 Jan 2013 11:52

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