Néel domain wall as a tunable filter for optically excited magnetostatic waves

Abstract

We present a concept of a tunable optical excitation of spin waves and filtering their spectra in a ferromagnetic film with 180${}^{\circ }$ Néel domain wall. We show by means of micromagnetic simulation that the fluence of the femtosecond laser pulse and its position with respect to the domain wall affect the frequencies of the excited spin waves, and the presence of the domain wall plays crucial role in control of the spin waves' spectrum. The predicted effects are understood by analyzing the changes of the spin waves' dispersion under the impact of the laser pulse.

arXiv comment7 pages, 5 figures

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Cited by in corpus (2)

• Spectrum evolution and chirping of laser-induced spin wave packets in thin iron films
• Unidirectional propagation of spin waves excited by femtosecond laser pulses in a planar waveguide