【摘要】 研究了覆盖层为铁磁性的 Fe和非铁磁性的 Ti、 Cu的 Co/Cu/Co三明治在室温和低温下 的巨磁电阻效应。实验结果表明，室温下有覆盖层时 , Co/ Cu/Co三明治的巨磁电阻效应值 没有明显变化，但以 Fe为覆盖层的样品的矫顽力和饱和场明显减小，而 Ti、 Cu覆盖层对三 明治样品的矫顽力和饱和场无太大的影响。温度降低时，覆盖层使 Co/Cu/Co三明治的巨 磁电阻值显著增加，表明样品的巨磁电阻效应与覆盖层及其与上层 Co所形成的界面密切相关。更多还原

【Abstract】 The giant magnetoresistance (GMR) in Co/Cu/Co sandwiches with ferromagnetic Fe capping layer or nonmagnetic Ti or Cu capping layer was investigated at room temperature and low temperature. At room temperature, it is found that the coercivity and saturation field of Co/Cu/Co sandwiches with Fe capping layer are obviously reduced, though the GMR values of Co/Cu/Co sandwiches with all capping layers show no obvious change. However, the Ti, Cu capping layers don’t affect the coercivity and saturation field of Co/Cu/Co sandwiches. With temperature decreasing, the capping layers strong-ly enhancethe GMR values of Co/Cu/Co sandwiches. All the results suggest that the giant magneto-resistance in Co/Cu/Co sandwich is strongly influenced by capping layer and the interface between mag-netic Co up-layer and capping layer.更多还原