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Magnetic imaging with femtosecond temporal resolution

  • A scanning Kerr microscope with a temporal resolution of <230 fs and a spatial resolution of 210 nm is presented. Equipped with a large temporal and spatial scanning range of 8 ns and 320 μm, respectively, the microscope allows studying nonuniform magnetization dynamics on many different time scales over a large area. For demonstration, we study the magnetization dynamics in Fe/Gd multilayer dot arrays exhibiting a spin reorientation transition (SRT) on three different time scales, namely, femtosecond, picosecond, and nanosecond scales. The dynamics on all time scales varies from one dot to another. This is attributed to the high sensitivity of the SRT to the variations of the layer thicknesses and the Fe/Gd interface structure.

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Author:Jie Li, Min-Sang Lee, Björn Redeker, Arndt Remhof, Edward Amaladass, Christoph Hassel, Thomas EimüllerGND
DOI:https://doi.org/10.1063/1.3170448
Identifier:0034-6748 OPAC HS OPAC extern
Parent Title (English):Review of Scientific Instruments
Publisher:AIP Publishing
Document Type:Article
Language:English
Date of Publication (online):2009/07/14
Year of first Publication:2009
Volume:80
Issue:7
Article Number:073703
Number of pages:5 Seiten
First Page:073703-1
Last Page:073703-5
Institutes:Fakultät Maschinenbau
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften
Publication Lists:Eimüller, Thomas
Publication reviewed:begutachtet
Release Date:2020/09/07
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