Events
Past events can be found in the archive.
Internal users can find the list of upcoming seminar presentations and the seminar dates to be booked in the E134 Colab Space., opens an external URL in a new window
11. December 2025, 11:00 until 12:00
Jon Gorchon, Université de Lorraine, CNRS, IJL, Nancy, F-54000, France
Seminar
Magneto-optical techniques are powerful tools for investigating ultrafast spin dynamics in magnetic materials [1,2] and are increasingly used to study spin and orbital angular momentum accumulation in magnetic/non-magnetic systems [3]. It was long believed that accumulation signals were much weaker than those from magnetization dynamics. Recently, we showed that under certain conditions these signals can match or even exceed magnetization signals during ultrafast demagnetization [4], and we demonstrated how to isolate them experimentally.
I will present experiments where we separate magnetization dynamics from spin accumulation. Accessing ultrafast spin accumulations enables identification of femtosecond laser–induced magnetization reversal mechanisms in multilayer stacks [5] and offers new means to probe angular momentum exchanges and transport properties. Moreover, these long propagating spin currents offer new ways to access buried magnetic information. This will be exploited to build a novel type of magneto-optical microscope.
[1] E. Beaurepaire et al., Physical Review Letters, 76, 4250 (1996)
[2] G. Malinowski et al., Nature Physics, 4, 855-858 (2008)
[3] Y.G. Choi et al., Nature, 619, 52-56 (2023)
[4] A. Anadón et al., Physical Review B, 112 (10), pp.104437 (2025)
Event details
- Event location
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SEM.R. DB gelb 05 B
1040 Wien
Wiedner Hauptstraße 8-10/E134 - Organiser
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IAP
Manuela Marik
marik@iap.tuwien.ac.at - Public
- Yes
- Entrance fee
- No
- Registration required
- No