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arXiv · 1004.4291

Six-fold in-plane magnetic anisotropy in Co-implanted ZnO (0001)

Numan Akdogan·Bulat Rameev·Sumeyra Guler·Osman Ozturk·Bekir Aktas·Hartmut Zabel·Rustam Khaibullin·Lenar Tagirov
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Abstract

Magnetic anisotropies of Co-implanted ZnO (0001) films grown on single-crystalline Al2O3 (11-20) substrates have been studied by ferromagnetic resonance (FMR) technique for different cobalt implantation doses. The FMR data show that the easy and hard axes have a periodicity of 60 degrees in the film plane, in agreement with the hexagonal structure of the ZnO films. This six-fold in-plane magnetic anisotropy, which is observed for the first time in ZnO-based diluted magnetic semiconductors, is attributed to the substitution of cobalt on Zn sites in the ZnO structure, and a clear indication for long range ferromagnetic ordering between substitutional cobalt ions in the single-crystalline ZnO films.

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Numan Akdogan, Bulat Rameev, Sumeyra Guler, Osman Ozturk, Bekir Aktas, Hartmut Zabel, Rustam Khaibullin, Lenar Tagirov. 2010-04-24. Six-fold in-plane magnetic anisotropy in Co-implanted ZnO (0001). https://doi.org/10.1063/1.3223583

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