MAGNETORESISTANCE IN NI80FE20/CU/NI80FE20/FE50MN50 SPIN VALVES WITH LOW COERCIVITY AND ULTRAHIGH SENSITIVITY

被引:52
作者
RIJKS, TGSM [1 ]
DEJONGE, WJM [1 ]
FOLKERTS, W [1 ]
KOOLS, JCS [1 ]
COEHOORN, R [1 ]
机构
[1] PHILIPS RES LABS,5656 AA EINDHOVEN,NETHERLANDS
关键词
D O I
10.1063/1.112202
中图分类号
O59 [应用物理学];
学科分类号
摘要
We present magnetoresistance measurements on Ni80Fe20/Cu/Ni80Fe20/Fe50Mn50 spin valves with crossed anisotropies: the easy magnetization direction of the unbiased Ni80Fe20 layer is perpendicular to the exchange biasing field which effectively works on the second Ni80Fe20 layer due to the interaction with the Fe50Mn50 layer. The hysteresis in the low-field magnetoresistance is less than 0.03 kA/m, which is ten times smaller than the hysteresis for similar materials with parallel anisotropies. The sensitivity (partial derivative R/R(infinity))/partial derivative H ranges from 8% to 18%/(kA/m), depending on the preparational method. To our knowledge this combination of very high sensitivity and very low coercivity has not been reported before.
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页码:916 / 918
页数:3
相关论文
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