Near-field magneto-caloritronic nanoscopy on ferromagnetic nanostructures
Source abstract
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.
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Research context
OpenAlex topics: Near-Field Optical Microscopy · Thermal Radiation and Cooling Technologies · Plasmonic and Surface Plasmon Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Experimental Molecular Biophysics, Department of Physics, Freie Universität Berlin 1 , 14195 Berlin, Germany
Physikalisch-Technische Bundesanstalt 2 , 38116 Braunschweig and 10587 Berlin, Germany
Cavendish Laboratory, University of Cambridge 3 , J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
SPINTEC, CEA, CNRS and Université Grenoble Alpes 4 , 17 Rue des Martyrs, 38054 Grenoble, France
Institute of Physics ASCR, v.v.i. 5 , 162 53 Praha 6, Czech Republic
Hitachi Cambridge Laboratory 6 , Cambridge CB3 0HE, United Kingdom
Funding
ERC Synergy · Deutsche Forschungsgemeinschaft
References (34)
Show source-provided references
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