Band gap control in a line-defect magnonic crystal waveguide

Journal Article · Mon Dec 14 04:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4937440· OSTI ID:22486238

Grishin, S. V.; Sadovnikov, A. V.; Romanenko, D. V.; Sharaevskii, Yu. P.; Nikitov, S. A. ^[1]

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1. Laboratory 'Metamaterials,' Saratov State University, Astrakhanskaya 83, Saratov 410012 (Russian Federation)

We report on the experimental observation of the spin wave spectrum control in a line-defect magnonic crystal (MC) waveguide. We demonstrate the possibility to control the forbidden frequency band (band gap) for spin waves tuning the line-defect width. In particular, this frequency may be greater or lower than the one of 1D MC waveguide without line-defect. By means of space-resolved Brillouin light scattering technique, we study the localization of magnetization amplitude in the line-defect area. We show that the length of this localization region depends on the line-defect width. These results agree well with theoretical calculations of spin wave spectrum using the proposed model of two coupled magnonic crystal waveguides. The proposed simple geometry of MC with line-defect can be used as a logic and multiplexing block for application in the novel field of magnonic devices.

• OSTI ID: 22486238
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 24 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
CONTROL
CRYSTALS
GEOMETRY
LIGHT SCATTERING
LINE DEFECTS
MAGNETIZATION
SPECTRA
SPIN WAVES
TUNING
WAVEGUIDES