Nanostructure and magnetic properties of highly (001) oriented L10 (Fe49Pt51)1−xCux films
Nanostructure and magnetic properties of highly (001) oriented L10 (Fe49Pt51)1−xCux films
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高(001)取向L10 (Fe49Pt51)1−xCux薄膜的纳米结构和磁性能
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
D. Sellmyer
中科院分区：
文献类型：
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作者：
M. Yan;Yinfan Xu;D. Sellmyer
我们报道了具有强（001）织构的非外延生长L10 cu合金FePt薄膜。将不同Cu含量的FePt薄膜直接沉积在Fe49Pt51∕Cu多层结构的Si晶片上。铜含量在0 ~ 13.0%之间变化。所有薄膜在600℃下退火5min。x射线衍射表征表明，只出现一组L10衍射峰，未见单质Cu衍射峰。这一结果以及不同的c∕a晶格参数比表明，Cu在L10晶格中取代了Fe或Pt，形成了三元FePtCu合金薄膜。（001）织构随着Cu含量的增加而增强。透射电镜图像显示，FePtCu晶粒尺寸约为10nm。对于FePt胶片11at。% Cu取代，矫顽力约为5kOe，适合在实际垂直记录薄膜上书写。
We report on nonepitaxially grown L10 Cu-alloyed FePt thin films with strong (001) texture. The FePt films with different Cu contents were deposited directly on Si wafers with a Fe49Pt51∕Cu multilayer structure. The Cu content was varied from 0to13at.%. All films were annealed at 600°C for 5min. X-ray-diffraction characterization showed that only one set of L10 diffraction peaks appeared and no elemental Cu diffraction peaks were visible. This result, along with a varying c∕a lattice-parameter ratio, suggests that Cu substitutes Fe or Pt in the L10 lattice and ternary FePtCu alloy films are formed. (001) texture was enhanced with the increase of Cu content. Transmission electron microscope images showed that the grain size of FePtCu was about 10nm. For FePt film with 11at.% Cu substitution, coercivity was about 5kOe, which is suitable for writing in a practical perpendicular-recording film.