Nano scale thermo-electrical detection of magnetic domain wall propagation
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.
Keywords
Cite
@article{arxiv.1611.07785,
title = {Nano scale thermo-electrical detection of magnetic domain wall propagation},
author = {Patryk Krzysteczko and James Wells and Alexander Fernandez Scarioni and Zbynek Soban and Tomas Janda and Xiukun Hu and Vit Saidl and Richard P. Campion and Rhodri Mansell and Ji-Hyun Lee and Russell P. Cowburn and Petr Nemec and Olga Kazakova and Joerg Wunderlich and Hans Werner Schumacher},
journal= {arXiv preprint arXiv:1611.07785},
year = {2017}
}
Comments
26 pages including supplementary information