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arXiv 1004.3763cond-mat.mtrl-sci
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界面磁化的鲁棒等温电开关:电压控制自旋电子学的途径

Robust isothermal electric switching of interface magnetization: A route to voltage-controlled spintronics

Xi He, Yi Wang, Ning Wu, Anthony Caruso, Elio Vescovo, K. D. Belashchenko, Peter A. Dowben, Christian Binek

摘要:

利用磁测量和自旋分辨光电子能谱测量观察到反铁磁氧化铬(0001)表面的粗糙度不敏感和电可控磁化,并解释了表面终止和磁有序的相互作用。此外,该表面放置在铁磁Co/Pd多层膜附近。在氧化铬和Co/Pd之间的界面上的交换耦合在Co/Pd膜中引起电可控的交换偏置,这使得Co/Pd膜的全局磁滞回线沿着磁场轴在负值和正值之间可逆等温(在室温下)移位。这些结果揭示了潜在的磁电氧化铬自旋电子应用需要非易失性电控制的磁化。

英文摘要:

Roughness-insensitive and electrically controllable magnetization at the (0001) surface of antiferromagnetic chromia is observed using magnetometry and spin-resolved photoemission measurements and explained by the interplay of surface termination and magnetic ordering. Further, this surface in placed in proximity with a ferromagnetic Co/Pd multilayer film. Exchange coupling across the interface between chromia and Co/Pd induces an electrically controllable exchange bias in the Co/Pd film, which enables a reversible isothermal (at room temperature) shift of the global magnetic hysteresis loop of the Co/Pd film along the magnetic field axis between negative and positive values. These results reveal the potential of magnetoelectric chromia for spintronic applications requiring non-volatile electric control of magnetization.

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