Narrow-band Tunable Spintronic THz Emission from Ferrimagnetic Nanofilms


Narrow-band Tunable Spintronic THz Emission from Ferrimagnetic Nanofilms

Awari, N.; Kovalev, S.; Fowley, C.; Rode, K.; Lau, Y.-C.; Betto, D.; Thiyagarajah, N.; Green, B.; Yildrim, O.; Lindner, J.; Fassbender, J.; Coey, M.; Deac, A.; Gensch, M.

We report on narrow-band THz emission from ferrimagnetic Mn3-xGa nano-films based. The emission originates from coherently excited spin precession. The central frequency of the emitted radiation is determined by the anisotropy field, while the bandwidth relates to Gilbert damping. It is shown how THz emission can be used for the characterization of dynamic properties of ultra-thin magnetic films. We furthermore study the dependence of THz emission on laser power and applied external magnetic field.

Keywords: THz emission; Heusler alloys

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Permalink: https://www.hzdr.de/publications/Publ-26776
Publ.-Id: 26776