Enhanced difference in switching fields for perpendicular magnetic spin valves with a composite [Co/Ni]N/TbCo reference layer
Enhanced difference in switching fields for perpendicular magnetic spin valves with a composite [Co/Ni]N/TbCo reference layer
复制标题
DOI：
10.1063/1.3536476
复制
发表时间：
2011-01-15
影响因子：
3.2
通讯作者：
Jin, Q. Y.
中科院分区：
文献类型：
--
作者：
Liao, Jialin;He, He;Jin, Q. Y.
由[Co/Ni](N)多层和亚铁磁性TbCo层组成的垂直交换耦合复合结构在用作自旋阀中的参考层时显示出特定的特征。通过稍微增加TbCo厚度，耦合结构的矫顽力大大增加，从而提供了一种有效的方法来扩大自由层和参考层的切换场的差异，并且使得可以在大范围的场中操纵平行或反平行的磁化强度。这种复合参考层不仅可以保持高垂直巨磁阻（GMR）比，而且还可以最小化次GMR曲线中的场偏移，这是由于参考层中的反铁磁对齐力矩产生的杂散场可以忽略不计。 (c) 2011 年美国物理研究所。 [号码：10.1063/1.3536476]
A perpendicularly exchange-coupled composite structure, which consists of a [Co/Ni](N) multilayer and a ferrimagnetic TbCo layer, displays specific features when it is utilized as a reference layer in spin valves. By slightly increasing the TbCo thickness, the coercivity of the coupled structure greatly increases, thereby giving an effective way to widen the difference in switching fields for the free and reference layers, and making it possible to manipulate magnetizations parallel or antiparallel for a wide range of fields. Such composite reference layer cannot only maintain a high perpendicular giant magnetoresistive (GMR) ratio, but it also minimizes the field offset in the minor GMR curves due to the negligible stray field generated by the antiferromagnetically aligned moments in the reference layer. (c) 2011 American Institute of Physics. [doi: 10.1063/1.3536476]