In-vacuum Helmholtz coils for pulsed magnetic fields studying ultrafast demagnetization
نویسندگان
چکیده
Abstract The availability of sub 100 fs short and highly intense free-electron laser (FEL) pulses allows for new insights in laser-induced ultrafast demagnetization (LID) ferromagnetic thin films on nanometer length scales. We designed a pair in-vacuum Helmholtz coils, providing pulsed magnetic fields up to µ 0 H z = ±45 mT, time-resolved experiments at FEL sources transmission geometry. report the implementation coils an optical-pump–resonant-magnetic-scattering (tr-XRMS) experiment FERMI (Elettra, Trieste) study LID different domain networks. discuss limitations multi-shot measurements, that rely full reversibility process in-between two pump–probe events, emphasize importance reference–pump–probe schemes, especially tr-XRMS employ external fields.
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ژورنال
عنوان ژورنال: Journal of physics
سال: 2022
ISSN: ['0022-3700', '1747-3721', '0368-3508', '1747-3713']
DOI: https://doi.org/10.1088/1742-6596/2380/1/012134