Evidence for weak electron confinement in spin valves having Co90Fe10/Cu/Co90Fe10 trilayers -: art. no. 014434
Evidence for weak electron confinement in spin valves having Co90Fe10/Cu/Co90Fe10 trilayers -: art. no. 014434
复制标题
DOI：
10.1103/physrevb.70.014434
复制
发表时间：
2004-07-01
影响因子：
3.7
通讯作者：
Gurney, BA
中科院分区：
文献类型：
--
作者：
Maat, S;Zeltser, A;Gurney, BA
测量了具有Co90Fe10/Cu/Co90Fe10钉扎/间隔层/自由层三层结构的自旋阀中自由层耦合场的温度和间隔层厚度的关系。我们的数据验证了先前的理论预测，即耦合场既取决于间隔层的费米面的形状，也取决于间隔层中磁性载流子的限制程度。在Co90Fe10/Cu/Co90Fe10等弱约束系统中，后一种机制在感兴趣的温度范围内可能很大，并且对层间耦合场的温度和间隔层厚度的依赖关系有显着影响。包括这两种机制，我们能够量化振荡中间层和Neel耦合场的贡献，以及振荡相位的温度相关数据。
The temperature and spacer-layer thickness dependences of the free layer coupling field in spin valves having Co90Fe10/Cu/Co90Fe10 pinned-/spacer-/free layer trilayer structures have been measured. Our data verify a previously made theoretical prediction that the coupling field depends on both the shape of the Fermi surface of the spacer layer and the degree of confinement of the magnetic carriers in the spacer quantum well. In weakly confining systems such as Co90Fe10/Cu/Co90Fe10 the latter mechanism can be large in the temperature range of interest and can have a significant impact on the temperature and spacer-layer thickness dependence of interlayer coupling fields. Including both mechanisms we are able to quantify the contribution of both the oscillatory interlayer and the Neel coupling field as well as the temperature-dependent data for the phase of the oscillations.