Magnetic Impurities

White, Robert M.

doi:10.1007/978-3-662-02360-0_7

Cited by 1 publication

(1 citation statement)

References 31 publications

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“…To acquire temporal evolution data, the time delay t between the pump and the probe pulses was scanned. By Fourier transforming the temporal and spatial dependence of the Faraday rotation angle, we obtained power spectra of the Faraday rotation: SWaT power spectra, which reflect the k -dependent dynamical magnetic susceptibility 31 ( Supplementary Note 1 ).…”

Section: Resultsmentioning

confidence: 99%

All-optical observation and reconstruction of spin wave dispersion

et al. 2017

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To know the properties of a particle or a wave, one should measure how its energy changes with its momentum. The relation between them is called the dispersion relation, which encodes essential information of the kinetics. In a magnet, the wave motion of atomic spins serves as an elementary excitation, called a spin wave, and behaves like a fictitious particle. Although the dispersion relation of spin waves governs many of the magnetic properties, observation of their entire dispersion is one of the challenges today. Spin waves whose dispersion is dominated by magnetostatic interaction are called pure-magnetostatic waves, which are still missing despite of their practical importance. Here, we report observation of the band dispersion relation of pure-magnetostatic waves by developing a table-top all-optical spectroscopy named spin-wave tomography. The result unmasks characteristics of pure-magnetostatic waves. We also demonstrate time-resolved measurements, which reveal coherent energy transfer between spin waves and lattice vibrations.

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Section: Resultsmentioning

confidence: 99%