Coercivity enhancement by Ru pinning layer in FePt thin films
Coercivity enhancement by Ru pinning layer in FePt thin films
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FePt 薄膜中 Ru 钉扎层增强矫顽力
DOI：
10.1063/1.1555792
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发表时间：
2003
影响因子：
3.2
通讯作者：
Jianping Wang
中科院分区：
文献类型：
--
作者：
Z. L. Zhao;J. Ding;Jingsheng Chen;Jianping Wang
采用直流磁控溅射法在Cr91Ru9衬底上制备了面心四方晶系（001）FePt薄膜。 为了提高磁畴的磁性，获得具有反形核机制的低交换耦合介质，在磁层中插入了一层Ru钉扎层，引入可控的缺陷来阻碍畴壁运动.在FePt磁性层之间加入1nm的Ru钉扎层后，面外矫顽力提高了60%。从角度依赖性的磁化率测量，观察到的磁化反转机制从典型的畴壁运动行为的成核模式，通过增加钉扎层的厚度。
The face-centered-tetragonal-(001) FePt thin films were prepared by dc magnetron sputtering Fe50Pt50 layer onto Cr91Ru9 underlayer at 400 °C. In order to enhance the coercivity and to obtain a relative lower exchange coupling medium with nucleation reversal mechanism, a nonmagnetic Ru pinning layer inserted in the magnetic layer is described to introduce controllable defects to impede domain-wall motion. A 60% increasing of the out-of-plane coercivity was observed after 1 nm Ru nonmagnetic pinning layer added between the FePt magnetic layers. From angular dependence of the coercivity measurement, the magnetization reversal mechanism was observed to shift from the typical domain-wall motion behavior to the nucleation mode by increasing the thickness of the pinning layer.