Impact of the magnetism of nano-oxide layers on the GMR effect in specular spin valves
Impact of the magnetism of nano-oxide layers on the GMR effect in specular spin valves
复制标题
纳米氧化物层的磁性对镜面自旋阀 GMR 效应的影响
DOI：
10.1016/j.jmmm.2003.12.770
复制
发表时间：
2004
影响因子：
2.7
通讯作者：
A. Veloso
中科院分区：
文献类型：
--
作者：
J. Ventura;J. B. Sousa;P. Freitas;A. Veloso
基于320-15K温度范围内的零场冷却和场冷(H=H0)实验，我们研究了镜面自旋阀的纳米氧化层的磁效应。发现在H0>；0(<；0)冷却后，ΔR/R在15K有小幅增加(减小)，但当H0=Δ500Oe时，−R/R出现急剧的最小值。此外，ΔR/R(T，H0)在T≈175K时偏离零校正曲线。这些特征与氧化层中的磁有序有关。
We study the magnetic effects of the nano-oxide layers of specular spin valves, based on zero-field-cooling and field-cooling (under H=H0) experiments in the 320–15K temperature range. One finds a small increase (decrease) of ΔR/R at 15K after H0>0 (<0) cooling, but a sharp ΔR/R minimum occurs when H0=−500Oe. Also ΔR/R(T,H0) departs from the ZFC curve at T≈175K. These features are related to magnetic ordering in the oxide layers.