期刊
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
卷 14, 期 4, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssr.202000011
关键词
magnonics; nonlinear wave dynamics; parametric pumping; spin waves; spintronics
资金
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [TRR 173 - 268565370]
- DFG [DU 1427/2-1]
- Nachwuchsring of the TU Kaiserslautern
- European Research Council [678309 MagnonCircuits]
- Austrian Science Fund (FWF) [I 4696-N]
- MES of Ukraine [0118U004007]
- Graduate School Material Science in Mainz (MAINZ)
Herein, experimental demonstration of the parallel parametric generation of spin waves in a microscaled yttrium iron garnet waveguide with nanoscale thickness is presented. Using Brillouin light scattering microscopy, the parametric excitation of the first and second waveguide modes by a stripline microwave pumping source is observed. Micromagnetic simulations reveal the wave vector of the parametrically generated spin waves. Based on analytical calculations, which are in excellent agreement with experiments and simulations, it is proved that the spin-wave radiation losses are the determinative term of the parametric instability threshold in this miniaturized system. The used method enables the direct excitation and amplification of nanometer spin waves dominated by exchange interactions. The presented results pave the way for integrated magnonics based on insulating nanomagnets.
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