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arXiv · 1611.07785

Nano scale thermo-electrical detection of magnetic domain wall propagation

Patryk Krzysteczko·James Wells·Alexander Fernandez Scarioni·Zbynek Soban·Tomas Janda·Xiukun Hu·Vit Saidl·Richard P. Campion·Rhodri Mansell·Ji-Hyun Lee·Russell P. Cowburn·Petr Nemec·Olga Kazakova·Joerg Wunderlich·Hans Werner Schumacher
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Abstract

In magnetic nanowires with perpendicular magnetic anisotropy (PMA) magnetic domain walls (DW) are narrow and can move rapidly driven by current induced torques. This enables important applications like high-density memories for which the precise detection of the position and motion of a propagating DW is of utmost interest. Today's DW detection tools are often limited in resolution, or acquisition speed, or can only be applied on specific materials. Here, we show that the anomalous Nernst effect provides a simple and powerful tool to precisely track the position and motion of a single DW propagating in a PMA nanowire. We detect field and current driven DW propagation in both metallic heterostructures and dilute magnetic semiconductors over a broad temperature range. The demonstrated spatial resolution below 20 nm is comparable to the DW width in typical metallic PMA systems.

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Patryk Krzysteczko, James Wells, Alexander Fernandez Scarioni, Zbynek Soban, Tomas Janda, Xiukun Hu, Vit Saidl, Richard P. Campion, Rhodri Mansell, Ji-Hyun Lee, Russell P. Cowburn, Petr Nemec, Olga Kazakova, Joerg Wunderlich, Hans Werner Schumacher. 2016-11-23. Nano scale thermo-electrical detection of magnetic domain wall propagation. https://doi.org/10.1103/physrevb.95.220410

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