Magnetic anisotropy of 3 nm diameter Co nanowires embedded in CeO2SrTiO3(001): a ferromagnetic resonance study

P. SCHIO; M. BARTUREN; J. MILANO; F. BONILLA; Y. ZHENG; F. VIDAL; A. J. A. DE OLIVEIRA

Materials Research Express

Institute of Physics

Año: 2014 vol. 1 p. 35015 - 35015

The magnetic anisotropy of 3-nm wide cobalt nanowires embedded in epitaxial CeO2/SrTiO3(001) layers is investigated by ferromagnetic resonance measurements. The measured magnetic shape and the magnetocrystalline anisotropies conrm that the Co nanowires have their main axes perpendicular to the lm surface, and they are composed of hcp Co grains with the c-axes oriented along one the directions of the CeO2 matrix. The eects of such peculiar structure on the magnetic anisotropy are addressed experimentally. The results show that the magnetic anisotropy of the wires is dominated by the magnetostatic term. The inhomogeneous structure of the wires leads to an eective magnetocrystalline anisotropy smaller than the bulk value of hcp Co.