Time-resolved photoemission electron microscopy of magnetic field and magnetisation changes
Abstract
Owing to its parallel image acquisition, photoemission electron microscopy is well suited for real-time observation of fast processes on surfaces. Pulsed excitation sources like synchrotron radiation or lasers, fast electric pulsers for the study of magnetic switching, and/or time-resolved detection can be utilised. A standard approach also being used in light optical imaging is stroboscopic illumination of a periodic (or quasi-periodic) process. Using this technique, the time dependence of the magnetic field in a pulsed microstrip line has been imaged in real time exploiting Lorentz-type contrast. Similarly, the corresponding field-induced changes in the magnetisation of cobalt microstructures deposited on the microstrip line have been observed exploiting magnetic X-ray circular dichroism as a contrast mechanism. The experiment has been performed at the UE 56/1-PGM at BESSY II (Berlin) in the single-bunch mode.
- Publication:
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Applied Physics A: Materials Science & Processing
- Pub Date:
- 2003
- DOI:
- 10.1007/s00339-002-1965-8
- Bibcode:
- 2003ApPhA..76..863K
- Keywords:
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- PACS: 07.78.+s;
- 31.70.Hq;
- 75.70.-i