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

Bilzer, C; Devolder, T; Chappert, C; Plantevin, O; Suszka, AK; Hickey, BJ; Lamperti, A; Tanner, BK; Mahrov, B; Demokritov, SO

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


C Bilzer

T Devolder

C Chappert

O Plantevin

AK Suszka

BJ Hickey

A Lamperti

BK Tanner

B Mahrov

SO Demokritov


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.


Bilzer, C., Devolder, T., Chappert, C., Plantevin, O., Suszka, A., Hickey, B., …Demokritov, S. (2008). Ferromagnetic resonance linewidth reduction in Fe/Au multilayers using ion beams. Journal of Applied Physics, 103(7), Article 07B518.

Journal Article Type Article
Publication Date Apr 1, 2008
Deposit Date Oct 29, 2012
Publicly Available Date Nov 2, 2012
Journal Journal of Applied Physics
Print ISSN 0021-8979
Electronic ISSN 1089-7550
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 103
Issue 7
Article Number 07B518
Keywords Ferromagnetic resonance, Gold, Interface roughness, Ion beam effects, Iron, Magnetic multilayers.


Published Journal Article (351 Kb)

Copyright 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

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