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。
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.
参考文献
| [1] | Baibich M N;Broto J M;Fert A et al.[J].Physical Review Letters,1988,61:2472. |
| [2] | Parkin S S P;Bhadra R;Riche K P .[J].Physical Review Letters,1991,66:2152. |
| [3] | Christides C.;Boukos N.;Travlos A.;Niarchos D.;Stavroyiannis S. .Microstructural modification in Co/Cu giant-magnetoresistance multilayers[J].Journal of Applied Physics,1998(7):3724-3730. |
| [4] | Vries J J de;Schudelaro A A P;Jungblut R et al.[J].Physical Review Letters,1995,75:4306. |
| [5] | Swagten HJM.;Bloemen PJH.;Willekens MMH.;Dejonge WJM.;Strijkers GJ. .ENHANCED GIANT MAGNETORESISTANCE IN SPIN-VALVES SANDWICHED BETWEEN INSULATING NIO[J].Physical Review.B.Condensed Matter,1996(14):9108-9114. |
| [6] | Sugita Y.;Kawawake Y.;Sakakima H.;Satomi M. .Enhancement of giant magnetoresistance in NiCoFe/Cu/Co with a Ag capping layer prepared by sputtering[J].Japanese journal of applied physics,1998(1):109-110. |
| [7] | Tomlinson M E;Pollard R I;Lord D G et al.[J].Journal of Magnetism and Magnetic Materials,1992,111:79. |
| [8] | 沈鸿烈;沈勤我;严健生 等.[J].功能材料与器件学报,1997,3(04):229. |
| [9] | Dieny B .[J].Journal of Magnetism and Magnetic Materials,1994,136:335. |
| [10] | Egelhoff W F;Chen P J;Powell C J et al.[J].IEEE Transactions on Magnetics,1997,33:3580. |
| [11] | Dieny B;Humbert P;Speriosu V S et al.[J].Physical Review B,1992,45:806. |
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