Spin-valve magnetoresistance in Co/Si/(Co/Cu/Co) multilayers

被引：0

作者：

沈鸿烈

李冠雄

机构：

[1] CollegeofMaterialsScienceandTechnology,NanjingUniversityofAeronauticsandAstronautics,Nanjing,China

来源：

TransactionsofNonferrousMetalsSocietyofChina | 2005年 / 06期

关键词：

spin-valve; magnetoresistance; multilayer; electron-beam evaporation;

D O I：

暂无

中图分类号：

TM27 [磁性材料、铁氧体];

学科分类号：

0805 ; 080502 ; 080801 ;

摘要：

A series of Co/Si/(Co/Cu/Co) multilayers and Co/Si/Co sandwiches were prepared by high vacuum (electron-beam) evaporation. It was found that a Si spacer (≥0.9nm) could greatly decrease the interlayer coupling in Co/Si/Co sandwiches and there was no magnetoresistance(MR) or spin-valve MR in them due to the high resistivity of Si spacer. While in Co/Si/(Co/Cu/Co) multilayers, we observed a spin-valve MR of about (0.5%) through a (nominal) 2.7nm Si spacer at room temperature. The spin-valve MR in Co/Si/(Co/Cu/Co) multilayers was attributed to the enhanced spin polarization of conduction electrons caused by the top Co/Cu/Co sandwich with GMR mechanism and high spin-dependent scattering at Co/Cu interface.

引用

页码：1280 / 1284

页数：5

共 19 条

[1]

Parkin S S P.Origin of enhanced magnetoresistance of magnetic multilayers : Spin-dependent scattering from magnetic interface states. Physical Review Letters . 1993

[2]

Dieny B.Giant magnetoresistance in spin-valve multi- layers. Journal of Magnetism and Magnetic Materials . 1994

[3]

Endo Y,Kitakami O,Shi mada Y.Measurement of perpendicular giant magnetoresistance of Fe/Si super- lattices. Applied Physics Letters . 1998

[4]

Mattson J E,Kumar S,Fullerton E E,et al.Photo- induced antiferromagnetic interlayer coupling in Fe/ (Fe-Si) superlattices. Physical Review Letters . 1993

[5]

Briner B,Landolt M.Intrinsic and heat-induced ex- change coupling through amorphous silicon. Physical Review Letters . 1994

[6]

Stearns MB,Chang C H,Stearns D G.Opti mization of growth conditions of vapor deposited Mo/Si multi- layers. Journal of Applied Physics . 1992

[7]

Fullerton E E,Bader S D.Temperature-dependent bi- quadratic couplingin antiferromagnetically coupled Fe/ FeSi multilayers. Physical Review B Condensed Matter and Materials Physics . 1996

[8]

Qian Z H,Daughton J M,Wang D X,et al.Magnetic design and fabrication of linear spin-valve sensors. IEEE Transactions on Magnetics . 2003

[9]

Dufour C,Bruson A,George B.Polarized neutron study of Fe/Si multilayers. Solid State Communi- cation . 1989

[10]

Wang D,Daughton J M,Smith C H,et al.Effect of Au underlayers on GMR properties of NiFe/Cu/CoFe sandwiches. IEEE Transactions on Magnetics . 1996

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