Magnetic anisotropy in ordered textured Co nanowires

The following article appeared in Applied Physics Letters 100.25 (2012): 252405 and may be found at http://scitation.aip.org/content/aip/journal/apl/100/25/10.1063/1.4729782The magnetization reversal in ordered arrays of Co nanowires with tailored hcp-phase texture, controlled by pH synthesis and nanowires length, has been investigated. The angular dependence of coercivity has been experimentally determined for different crystal textures, and the corresponding magnetization reversal mode is interpreted by analytical modelling. The results show that reversal takes place by propagation of a transverse-like domain wall mode. The fitting of experimental and calculated data allows us the quantitative evaluation of the magnetocrystalline anisotropy constant strength whose magnetization easy direction evolves from parallel to the wires toward in-plane orientation with the change of hcp-phase textureThe project has been performed under bilateral Chile-Spain project 2010CL0018. Additional financial support is acknowledged from the Spanish Ministry of Science and Innovation, MICINN, and MAT2010-20798-C05-01. Financial support from FONDECYT No. 1110784, Grant ICM P10-061-F by Fondo de Innovación para la Competitividad-MINECON and Financiamiento Basal para Centros Científicos y Tecnológicos de Excelencia, under project FB0807