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Ultrafast resonant ...
Ultrafast resonant magnetic scattering at the European XFEL
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- Zhou Hagström, Nanna (författare)
- Stockholms universitet,Fysikum
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- Bonetti, Stefano (preses)
- Stockholms universitet,Fysikum
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(creator_code:org_t)
- Stockholm : Stockholm University, 2020
- Engelska.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- Magnetic materials are of interest in a wide range of nanotechnologies such as for data storage, memory, logic, and sensing applications. Today, there is a strong desire to manipulate magnetism at timescales below the picosecond. There is therefore a high motivation in studying ultrafast magnetism at the nanoscale. Resonant soft X-ray scattering and imaging are unique techniques that can combine nanometer spatial resolution and femtosecond time resolution in the study of magnetic materials.We performed X-ray scattering experiments at the X-ray free electron laser in Hamburg, the European XFEL to measure the demagnetization in different magnetic thin films. This thesis will first present the different ways X-rays are generated. I will in particular focus on synchrotron radiation and the recent the development of X-ray free electron lasers (XFEL). I will then introduce resonant soft X-ray measurements and show how resonant X-ray scattering and X-ray imaging are powerful tools to investigate magnetism. I will illustrate this with two experiments carried out at the European XFEL in Hamburg. In the first experiment we performed X-ray holography to image magnetic structures in nanodots. In the second experiment we performed resonant X-ray scattering on magnetic thin films with stripe domains to elucidate domain motions at the ultrafast timescales.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- XFEL
- ultrafast magnetism
- holography
- SAXS
- fysik
- Physics
Publikations- och innehållstyp
- vet (ämneskategori)
- lic (ämneskategori)
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