Spin valves exchange biased by Co/Ru/Co synthetic antiferromagnets

被引:105
作者
Leal, JL [1 ]
Kryder, MH [1 ]
机构
[1] Carnegie Mellon Univ, Dept Elect & Comp Engn, Ctr Data Storage Syst, Pittsburgh, PA 15213 USA
关键词
D O I
10.1063/1.366597
中图分类号
O59 [应用物理学];
学科分类号
摘要
Spin valves exchange biased by a Co/Ru/Co synthetic antiferromagnet were fabricated and characterized. Room temperature measurements show giant-magnetoresistance ratios above 5% and that fields in excess of 5000 Oe are needed to saturate the synthetic antiferromagnet. The saturation field of the synthetic antiferromagnet is higher than 3000 Oe at 250 degrees C, which yields the possibility of observing the spin valve effect at very high temperatures. The transfer curve of the patterned structure shows a much weaker magnetostatic coupling than that observed in standard spin valves of identical dimensions. This is a consequence of the particular magnetic configuration of the synthetic antiferromagnet, which promotes an almost vanishing magnetostatic field. (C) 1998 American Institute of Physics. [S0021-8979(98)03107-7].
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页码:3720 / 3723
页数:4
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