Magnetization dynamics through magnetoimpedance effect in isotropic Co 2FeAl/Au/Co2FeAl full-heusler alloy trilayer films

Marcio Assolin Corrêa, Vivian Montardo Escobar, Osvaldo Trigueiro-Neto, Felipe Bohn, Kelly Daiane Sossmeier, Claudionor Gomes Bezerra, Carlos Chesman, John Pearson, Axel Hoffmann

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Abstract

We investigate the magnetization dynamics in low damping parameter α systems by measuring the magnetoimpedance effect over a wide range of frequencies, from 0.1 to 3.0 GHz, in Co2FeAl/Au/CoFeAl full-Heusler alloy trilayer films grown by magnetron sputtering on glass and MgO substrates. We show that the film produced on the glass substrate presents high magnetoimpedance performance, while that grown on the MgO substrate has low magnetoimpedance performance. Since both films are polycrystalline and have isotropic in-plane magnetic properties, we interpret the magnetoimpedance results in terms of the low damping parameter α and strain effects in the films. Thus, we verified that our films present good magnetoimpedance performance and showed that high performance can be achieved even in films with isotropic in-plane magnetic properties, since they present low damping parameter α.

Original languageEnglish (US)
Article number093001
JournalApplied Physics Express
Volume6
Issue number9
DOIs
StatePublished - Sep 1 2013
Externally publishedYes

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ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Corrêa, M. A., Escobar, V. M., Trigueiro-Neto, O., Bohn, F., Sossmeier, K. D., Bezerra, C. G., Chesman, C., Pearson, J., & Hoffmann, A. (2013). Magnetization dynamics through magnetoimpedance effect in isotropic Co 2FeAl/Au/Co2FeAl full-heusler alloy trilayer films. Applied Physics Express, 6(9), [093001]. https://doi.org/10.7567/APEX.6.093001