Details

Autor(en) / Beteiligte

• Pfitzner, E.
• Hu, X.
• Schumacher, H. W.
• Hoehl, A.
• Venkateshvaran, D.
• Cubukcu, M.
• Liao, J.-W.
• Auffret, S.
• Heberle, J.
• Wunderlich, J.
• Kästner, B.

Titel

Near-field magneto-caloritronic nanoscopy on ferromagnetic nanostructures

Ist Teil von

• AIP advances, 2018-12, Vol.8 (12), p.125329-125329-6

Ort / Verlag

Melville: American Institute of Physics

Erscheinungsjahr

2018

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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.