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arXiv · 2103.12367

Ultrafast element-resolved magneto-optics using a fiber-laser-driven extreme ultraviolet light source

Christina Möller·Henrike Probst·Johannes Otto·Karen Stroh·Carsten Mahn·Sabine Steil·Vasily Moshnyaga·G. S. Matthijs Jansen·Daniel Steil·Stefan Mathias
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Abstract

We present a novel setup to measure the transverse magneto-optical Kerr effect in the extreme ultraviolet spectral range at exceptionally high repetition rates based on a fiber laser amplifier system. This affords a very high and stable flux of extreme ultraviolet light, which we use to measure element-resolved demagnetization dynamics with unprecedented depth of information. Furthermore, the setup is equipped with a strong electromagnet and a cryostat, allowing measurements between 10 and 420 K using magnetic fields up to 0.86 T. The performance of our setup is demonstrated by a set of temperature- and time-dependent magnetization measurements showing distinct element-dependent behavior.

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Christina Möller, Henrike Probst, Johannes Otto, Karen Stroh, Carsten Mahn, Sabine Steil, Vasily Moshnyaga, G. S. Matthijs Jansen, Daniel Steil, Stefan Mathias. 2021-03-23. Ultrafast element-resolved magneto-optics using a fiber-laser-driven extreme ultraviolet light source. https://doi.org/10.1063/5.0050883

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