Magnetization reversal dynamics in Au/Co/Au(111) ultrathin films: Effect of roughness of the buffer layer |
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Authors: | A Adanlété Adjanoh J Vogel M Ayadi |
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Institution: | a Département de Physique, Faculté des Sciences de Tunis, Campus Universitaire le Belvédère, Tunis 1060, Tunisia b Institut Néel (CNRS and UJF), 25 rue des Martyrs, B.P. 166, 38042 Grenoble cedex 9, France |
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Abstract: | We present a study of the magnetization reversal dynamics in ultrathin Au/Co/Au films with perpendicular magnetic anisotropy, for a Co thickness of 0.5, 0.7 and 1 nm. In these films, the magnetization reversal is dominated by domain nucleation for tCo=0.5, 0.7 nm and by domain wall propagation for tCo=1 nm. The prevalence of domain nucleation for the thickness range 0.5-0.7 nm is different from results reported in the literature, for the same system and for the same thickness range, where the magnetization reversal took place mainly by domain wall motion. We attribute this difference to the effect of roughness of the Au buffer layer on the morphology of the magnetic layer. |
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Keywords: | DW motion Nucleation Kerr microscopy Thickness fluctuation |
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