Magnetic properties and microstructure of graded Fe/FePt films
Magnetic properties and microstructure of graded Fe/FePt films
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DOI：
10.1063/1.3446198
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发表时间：
2010-06
影响因子：
3.2
通讯作者：
J. Tsai;H. Tzeng;Bing-Fong Liu
中科院分区：
文献类型：
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作者：
J. Tsai;H. Tzeng;Bing-Fong Liu
在玻璃基板上制备了垂直磁化的软/硬Fe/FePt双层膜。退火后的Fe/FePt薄膜由于纳米级的软/硬界面耦合，使得Fe/FePt尖锐界面被修饰为Fe/（富铁FePt）/FePt梯度界面，并具有刚性磁化。在单个开关场中，磁化强度被逆转，并由双自旋模型解释。随着Fe/FePt薄膜退火温度的升高，在600 ~ 700℃时剩磁强度不断减小，但面外矫顽力明显增大，这可以用梯度磁各向异性来解释。交换耦合复合薄膜的矫顽力可调。
A soft/hard Fe/FePt bilayer with perpendicular magnetization was prepared on a glass substrate. Annealed Fe/FePt film allowed modification of the Fe/FePt sharp interface to Fe/(Fe-rich FePt)/FePt graded interface with rigid magnetization due to the nanoscale soft/hard interface coupling. The magnetization was reversed at a single switching field and interpreted by the two-spin model. When the annealed temperature of the Fe/FePt film increased, the remanence magnetization decreased continuously but the out-of-plane coercivity increased obviously at 600–700 °C which was interpreted by the graded magnetic anisotropy. The coercivity can be tuning in the exchange coupled composite film.