Magnetic properties of granular CoCrPt:SiO2 films as tailored by Co+ irradiation
Magnetic properties of granular CoCrPt:SiO2 films as tailored by Co+ irradiation
复制标题
通过 Co 辐照定制颗粒状 CoCrPt:SiO2 薄膜的磁性
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
M. Albrecht
中科院分区：
文献类型：
--
作者：
S. Tibus;T. Strache;F. Springer;D. Makarov;H. Rohrmann;T. Schrefl;J. Fassbender;M. Albrecht
We report on an approach to tailor the magnetic exchange in a conventional granular CoCrPt:SiO2 recording medium by irradiation with Co+ ions. Irradiation at low fluences enhances the intergranular exchange resulting in a narrowing of the switching field distribution (SFD). The modification of magnetic exchange coupling was evidenced by measuring the angular dependence of the switching field and is supported by an increase in the magnetic domain size. Further, micromagnetic simulations of a granular magnetic medium confirm the correlation between intergranular exchange and SFD. At high fluences, however, the irradiation damages lead to the degradation of the magnetic layer as magnetic anisotropy and saturation magnetization decrease. Ion irradiation simulations suggest that this is caused by strong intermixing at the grain and layer interfaces.
