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This is a representation of the spin-wave current detected by X-rays. A temperature gradient (blue and red) generates a spin wave current (orange arrows and wave traces) in the yttrium iron garnet sample. X-ray beams hit the sample and scatter back.

Tracing Invisible Spin Currents

Scientists directly observed spin wave currents using advanced Resonant X-ray Scattering.

Illustration of an undulator’s magnetic field being manipulated to generate ultrafast X-ray pulses. The illustration compares the process to music: Instead of individual notes, researchers played a full melody.

Demonstrating Unprecedented Control of X-ray Pulses

Researchers have used an undulator’s magnetic field to generate and control ultrafast X-ray pulses.

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