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Perpendicular magnetic anisotropy in Nd-Co alloy films nanostructured by di-block copolymer templates

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2012-10-15
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American Institute of Physics
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Nd-Co amorphous magnetic films with perpendicular magnetic anisotropy have been grown on nanostructured templates prepared with self-organized di-block poly(styrene)-block-poly(4-vinylpyridine) copolymer layers with a periodic structure of 60 nm spaced pores. These templates modify both the magnetic film topography and mechanical strain on a local scale. The effect of these structural changes is particularly noticeable in the low thickness range of the magnetic films where the transition from in-plane to out-of plane magnetization takes place. The Nd-Co films grown on the copolymer template present lower perpendicular magnetic anisotropy and, also, stronger stripe domain pinning effects in comparison with reference films grown on flat Si substrates.
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©2012 American Institute of Physics. Artículo firmado por más de diez autores. Work supported by Spanish MEC under Grants FIS2008- 06249 and Consolider CSD2007-00010 and by CAM under Grant S2009/MAT-1726. We acknowledge helpful discussions with Professor T. P. Russell and Dr. R. Morales.
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