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Effect of substrate...
Effect of substrate roughness on the magnetic properties of thin fcc Co films
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Steinmuller, S. J. (författare)
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Vaz, C. A. F. (författare)
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- Ström, Valter (författare)
- KTH,Materialvetenskap,University of Cambridge, United Kingdom
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Moutafis, C. (författare)
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Tse, D. H. Y. (författare)
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Gürtler, C. M. (författare)
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Kläui, M. (författare)
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Bland, J. A. C. (författare)
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Cui, Z. (författare)
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(creator_code:org_t)
- 2007
- 2007
- Engelska.
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Ingår i: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 76:5, s. 054429-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- We present a study of the influence of substrate roughness on the magnetic properties of thin fcc Co films (7 and 17 nm thick) grown on Cu(001)/Si(001). A significant decrease in cubic anisotropy with increasing film roughness was observed with Brillouin light scattering and magneto-optical Kerr effect magnetometry. In addition, the rougher samples showed a substantial broadening of the spin wave peaks. Both effects were found to be more pronounced for the thinner Co layers. Our observations are discussed in the framework of a theoretical model which takes into account the morphology of the Co films as measured by atomic force microscopy. While roughness effects are usually discussed in the context of Néel's "orange-peel" model, we propose a qualitatively different effect in this work whereby the magnetization follows coherently the substrate morphology ("undulating" state) resulting in the absence of magnetic surface charges. This magnetic configuration gives rise to a reduction in the magnetic anisotropy of epitaxial thin films, which is in good qualitative agreement with the experimental observations.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
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