Chen T Y, Ji Y, Chien C L, Stiles M D
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.
Phys Rev Lett. 2004 Jul 9;93(2):026601. doi: 10.1103/PhysRevLett.93.026601. Epub 2004 Jul 6.
We demonstrate spin-transfer torque effects in a single exchange-biased ferromagnetic layer. A current through a point contact to the exchange-biased Co layer reverses the magnetization of a nanodomain in the layer hysteretically for low applied magnetic fields and reversibly for high fields (up to 9 T). These effects are the inverse of the domain wall magnetoresistance, in the same way that similar effects in multilayers are the inverse of giant magnetoresistance.
我们在单个交换偏置铁磁层中展示了自旋转移转矩效应。通过与交换偏置钴层的点接触的电流，对于低外加磁场，会使该层中的纳米畴的磁化强度滞后反转，而对于高磁场（高达9特斯拉）则会可逆地反转。这些效应与畴壁磁阻相反，就如同多层膜中的类似效应与巨磁阻相反一样。
