What question did this study set out to answer?

To determine the nature and mechanism of optically induced short-range magnetic fluctuations occurring on a 10-nanometer length scale during ultrafast demagnetization.

November 29, 2023Physical review. B./Physical review. BOpen Access

Short nanometer range optically induced magnetic fluctuations accompanying ultrafast demagnetization of nanoscale ferromagnetic domains

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Authors

ССС.М. СутуринITMO University AKA. KobsDeutsches Elektronen-Synchrotron DESY RCRobert CarleyEuropean X-Ray Free-Electron Laser

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Implication

Time-resolved x-ray scattering reveals short-range magnetic fluctuations in cobalt-platinum multilayers, suggesting laser heating disrupts nanoscale domain networks.

Key Points

To determine the nature and mechanism of optically induced short-range magnetic fluctuations occurring on a 10-nanometer length scale during ultrafast demagnetization.
Probed magnetization dynamics in ferromagnetic cobalt/platinum (Co/Pt) multilayers with time-resolved femtosecond soft x-ray pulses at the European X-ray Free-Electron Laser.
Simulated the optically induced response of the nanoscale magnetic domain system using a two-temperature atomistic spin model.
Observed transient, purely magnetic high-q scattering at wave vectors of 0.2 to 0.8 nm⁻¹ on a picosecond timescale directly correlated with the destruction of the maze domain network.
Ascribed the high-q scattering to laser-induced short-range magnetic fluctuations that emerge within the disturbed, partially intact magnetic domain structure.
Determined via spin simulations that laser-driven heating induces the thermal fluctuations responsible for the domain network disruption.

Cite This Study

Сутурин et al. (2023) studied this question.

synapsesocial.com/papers/6a9e88f3e056b05edee98fd5 https://doi.org/10.1103/physrevb.108.174444

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Implication

Time-resolved x-ray scattering reveals short-range magnetic fluctuations in cobalt-platinum multilayers, suggesting laser heating disrupts nanoscale domain networks.

Short nanometer range optically induced magnetic fluctuations accompanying ultrafast demagnetization of nanoscale ferromagnetic domains

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Cite This Study

Short nanometer range optically induced magnetic fluctuations accompanying ultrafast demagnetization of nanoscale ferromagnetic domains

Discussion

Member takes

Implication

Key Points

Cite This Study

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