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Generation of spin waves by a train of fs-laser pulses: a novel approach for tuning magnon wavelengthстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Savochkin I.V., Jäckl M., Belotelov V.I., Akimov I.A., Kozhaev M.A., Sylgacheva D.A., Chernov A.I., Shaposhnikov A.N., Prokopov A.R., Berzhansky V.N., Yakovlev D.R., Zvezdin A.K., Bayer M.
- Журнал: Scientific reports
- Том: 7
- Номер: 1
- Год издания: 2017
- Издательство: Nature Publishing Group
- Местоположение издательства: United Kingdom
- DOI: 10.1038/s41598-017-05742-x
- Аннотация: Currently spin waves are considered for computation and data processing as an alternative to charge currents. Generation of spin waves by ultrashort laser pulses provides several important advances with respect to conventional approaches using microwaves. In particular, focused laser spot works as a point source for spin waves and allows for directional control of spin waves and switching between their different types. For further progress in this direction it is important to manipulate with the spectrum of the optically generated spin waves. Here we tackle this problem by launching spin waves by a sequence of femtosecond laser pulses with pulse interval much shorter than the relaxation time of the magnetization oscillations. This leads to the cumulative phenomenon and allows us to generate magnons in a specific narrow range of wavenumbers. The wavelength of spin waves can be tuned from 15 μm to hundreds of microns by sweeping the external magnetic field by only 10 Oe or by slight variation of the pulse repetition rate. Our findings expand the capabilities of the optical spin pumpprobe technique and provide a new method for the spin wave generation and control.
- Добавил в систему: Сылгачева Дарья Анатольевна