Nanoscale magnetization and current imaging using scanning-probe magneto-thermal microscopy
Abstract
Magnetic microscopy that combines nanoscale spatial resolution with picosecond scale temporal resolution uniquely enables direct observation of the spatiotemporal magnetic phenomena that are relevant to future high-speed, high-density magnetic storage and logic technologies. Magnetic microscopes that combine these metrics has been limited to facility-level instruments. To address this gap in lab-accessible spatiotemporal imaging, we develop a time-resolved near-field magnetic microscope based on magneto-thermal interactions. We demonstrate both magnetization and current density imaging modalities, each with spatial resolution that far surpasses the optical diffraction limit. In addition, we study the near-field and time-resolved characteristics of our signal and find that our instrument possesses a spatial resolution on the scale of 100 nm and a temporal resolution below 100 ps. Our results demonstrate an accessible and comparatively low-cost approach to nanoscale spatiotemporal magnetic microscopy in a table-top form to aid the science and technology of dynamic magnetic devices with complex spin textures.
Cite
@article{arxiv.2102.02792,
title = {Nanoscale magnetization and current imaging using scanning-probe magneto-thermal microscopy},
author = {Chi Zhang and Jason M. Bartell and Jonathan C. Karsch and Isaiah Gray and Gregory D. Fuchs},
journal= {arXiv preprint arXiv:2102.02792},
year = {2021}
}