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Near-field magneto-caloritronic nanoscopy on ferromagnetic nanostructures

Pfitzner, E; Hu, X; Schumacher, HW; Hoehl, A; Venkateshvaran, D; Cubukcu, M; Liao, J-W; ... Kaestner, B; + view all (2018) Near-field magneto-caloritronic nanoscopy on ferromagnetic nanostructures. AIP Advances , 8 (12) 10.1063/1.5054382. Green open access

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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.

Type: Article
Title: Near-field magneto-caloritronic nanoscopy on ferromagnetic nanostructures
Open access status: An open access version is available from UCL Discovery
DOI: 10.1063/1.5054382
Publisher version: https://doi.org/10.1063/1.5054382
Language: English
Additional information: Copyright © Author(s) 2018. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/ licenses/by/4.0/).
Keywords: Magnetism, Scanning probe microscopy, Infrared radiation, Electromotive force, Thermoelectric effects
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10066417
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