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| Home > Publications database > Picosecond Magnetization Dynamics of Nanostructures Imaged with Pump-Probe Techniques in the Visible and Soft X-Ray Spectral Range |
| Contribution to a book | PUBDB-2018-03758 |
;
2018
Springer Nature Switzerland AG
Heidelberg
ISBN: 978-3-319-99557-1
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Please use a persistent id in citations: doi:10.1007/978-3-319-99558-8_14
Abstract: The most direct way of accessing and understanding fast dynamical processes in nature is by capturing the motion in real space with a high temporal and spatial resolution. This chapter details time-resolved imaging techniques for probing the transient evolution of the magnetization in small magnetic systems in the visible and soft X-ray spectral range. Optical methods using femtosecond laser pulses can follow ultrafast processes with an extreme temporal resolution. The spatial resolution, however, is limited by diffraction to a few hundred nanometers at visible wavelengths. The dynamics of smaller structures can be investigated using X-ray microscopy at synchrotron radiation sources. A resolution of a few ten nanometers can be achieved, however, the time-resolution is limited to a few hundred picoseconds due to the pulse duration of the synchrotron bunches. Spin-wave packets are captured by optical methods using a time-resolved confocal Kerr microscope where backward volume spin-wave packets with counterpropagating group- and phase velocity are observed directly. Time-resolved X-ray microscopy is used to monitor the destruction and emergence of equilibrium domain patterns out of uniformly magnetized states.
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