Near-field magneto-caloritronic nanoscopy on ferromagnetic nanostructures
Mesoscale and Nanoscale Physics
2019-02-13 v1 Materials Science
Abstract
Near-field optical microscopy by means of infrared photocurrent mapping has rapidly developed in recent years. In this letter we introduce a near-field induced contrast mechanism arising when a conducting surface, exhibiting a magnetic moment, is exposed to a nanoscale heat source. The magneto-caloritronic response of the sample to near-field excitation of a localized thermal gradient leads to a contrast determined by the local state of magnetization. By comparing the measured electric response of a magnetic reference sample with numerical simulations we derive an estimate of the field enhancement and the corresponding temperature profile induced on the sample surface.
Keywords
Cite
@article{arxiv.1808.10767,
title = {Near-field magneto-caloritronic nanoscopy on ferromagnetic nanostructures},
author = {E. Pfitzner and X. Hu and H. W. Schumacher and A. Hoehl and D. Venkateshvaran and M. Cubukcu and J. -W. Liao and S. Auffret and J. Heberle and J. Wunderlich and B. Kaestner},
journal= {arXiv preprint arXiv:1808.10767},
year = {2019}
}