Near-field magneto-caloritronic nanoscopy on ferromagnetic nanostructures
Authors
Pfitzner, E
Hu, X
Schumacher, HW
Hoehl, A
Change log
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.
Publication Date
2018
Online Publication Date
2018-12-27
Acceptance Date
2018-12-07
Keywords
cond-mat.mes-hall, cond-mat.mes-hall, cond-mat.mtrl-sci
Journal Title
AIP Advances
Journal ISSN
2158-3226
2158-3226
2158-3226
Volume Title
8
Publisher
American Institute of Physics
Sponsorship
European Research Council (610115)
This work was supported by the Deutsche Forschungsgemeinschaft through grant HE 2063/5-1 to JH. The work also received funding from the ERC synergy grant No. 610115