XMCD microscopy with synchronized soft X-ray and laser pulses at PETRA III for time-resolved studies

Wessels, Philipp; Schlie, Moritz; Wieland, Marek; Ewald, Johannes; Abbati, G; Baumbach, Stefan; Overbuschmann, J.; Nisius, Thomas; Vogel, Andreas; Neumann, Alexander; Meents, A.; Viefhaus, Jens; Oepen, Hans Peter; Meier, Guido; Wilhein, Thomas; Drescher, Markus

doi:10.1088/1742-6596/463/1/012023

Cited by 7 publications

(8 citation statements)

References 14 publications

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“…We have set up a new time-resolving full-field magnetic transmission x-ray microscope (TR-MTXM) [25][26][27] that can be attached to the beamline. A grating condenser [28] consisting of 940 diffraction gratings of 25 × 25-μm 2 size and an included central stop homogeneously illuminates the sample with a flat-top profile of 20-μm diameter.…”

Section: Methodsmentioning

confidence: 99%

Time-resolved imaging of domain pattern destruction and recovery via nonequilibrium magnetization states

et al. 2014

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The destruction and formation of equilibrium multidomain patterns in permalloy (Ni 80 Fe 20 ) microsquares has been captured using pump-probe x-ray magnetic circular dichroism (XMCD) spectromicroscopy at a new full-field magnetic transmission soft x-ray microscopy endstation with subnanosecond time resolution. The movie sequences show the dynamic magnetization response to intense Oersted field pulses of approximately 200-ps root mean square (rms) duration and the magnetization reorganization to the ground-state domain configuration. The measurements display how a vortex flux-closure magnetization distribution emerges out of a nonequilibrium uniform single-domain state. During the destruction of the initial vortex pattern, we have traced the motion of the central vortex core that is ejected out of the microsquare at high velocities exceeding 1 km/s. A reproducible recovery into a defined final vortex state with stable chirality and polarity could be achieved. Using an additional external bias field, the transient reversal of the square magnetization direction could be monitored and consistently reproduced by micromagnetic simulations.

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Section: Methodsmentioning

confidence: 99%

Time-resolved imaging of domain pattern destruction and recovery via nonequilibrium magnetization states

et al. 2014

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“…The rise time of the current pulse is on the order of several hundreds of ps, which matches the temporal resolution at the synchrotron-based xray source. Shorter excitations using laser pulses are also avaiable (99).…”

Section: Dynamics Of Nanoscale Magnetismmentioning

confidence: 99%

Time-Resolved X-Ray Microscopy for Materials Science

Wen

Cherukara

Holt

2019

Annu. Rev. Mater. Res.

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X-ray microscopy has been an indispensable tool to image nanoscale properties for materials research. One of its recent advances is to extend microscopic studies to the time domain for visualizing the dynamics of nanoscale phenomena. Large-scale x-ray facilities have been the powerhouse of time-resolved x-ray microscopy. Their upgrades including a significant reduction of the x-ray emittance at storage rings and fully coherent ultrashort xray pulses at free electron lasers, will lead to new developments in instrumentation and open new scientific opportunities for x-ray imaging of nanoscale dynamics with the simultaneous attainment of unprecedentedly high spatial and temporal resolutions. This review presents recent progress in and the outlook for time-resolved x-ray microscopy in the context of ultrafast nanoscale imaging and its applications to condensed matter physics and materials science.

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“…An interesting approach has been realized at DESY in Hamburg/Germany, where the positron-electron tandem-ring accelerator (PETRA) facility storage ring, which was originally used for research on elementary particles, was recycled into a dedicated synchrotron source with the highest brillance worldwide. Although with its 6 GeV energy, it serves more the hard X-ray community, and PETRA III also hosts a powerful soft X-ray beamline, where recently a full-field X-ray microscope was installed [74].…”

Section: Polarized Soft X-rays As a Probe For Magnetism A Sourcmentioning

confidence: 99%

X-Ray Imaging of Magnetic Structures

Fischer

2015

IEEE Trans. Magn.

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The characterization of nanoscale magnetic structures, their static properties, and fast spin dynamics with polarized soft X-rays has become an indispensable analytical tool due to the unique features of those probes. The spectroscopic magnetic response serves as a fingerprint of the specimen and can give quantitative information on element-specific spin and orbital magnetic moments. Images of magnetic domain structures at a spatial resolution down to nearly 10 nm, ultimately in all three dimensions, can be obtained with various X-ray microscopy techniques and can further be combined with stroboscopic pump-probe schemes to image the spin dynamics of spin structures, such as the motion of domain walls in nanowires or the vortex core dynamics in micropatterned magnetic elements. Next generation sources of polarized soft X-rays such as X-ray free electron lasers or high-harmonic generation laser sources hold the promise to provide nanometer spatial and femtosecond time resolution, enabling to address thus fundamental magnetic length and time scales in magnetism. This paper reviews the various X-ray imaging techniques using polarized soft X-rays by summarizing their characteristic features, recent achievements, and current limitations as well as future opportunities. A brief overview on other magnetic imaging techniques are given to set magnetic X-ray imaging techniques into context. Index Terms-Magnetic diffractive imaging, photoemission electron microscopy, soft X-ray spectromicroscopy, spin dynamics, X-ray magnetic circular dichroism (XMCD), X-ray optics. 0018-9464

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XMCD microscopy with synchronized soft X-ray and laser pulses at PETRA III for time-resolved studies

Cited by 7 publications

References 14 publications

Time-resolved imaging of domain pattern destruction and recovery via nonequilibrium magnetization states

Time-resolved imaging of domain pattern destruction and recovery via nonequilibrium magnetization states

Time-Resolved X-Ray Microscopy for Materials Science

X-Ray Imaging of Magnetic Structures

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