期刊
SCIENTIFIC REPORTS
卷 3, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep02444
关键词
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资金
- Department of Science and Technology, Government of India [INT/EC/CMS (24/233552), SR/NM/NS-09/2007]
- Department of Information Technology, Government of India [1(7)/2010/MC]
- European Community's FP7 [233552, 228673]
- NCN of Poland [DEC-2-12/07/E/ST3/00538]
- CSIR - Senior Research Fellowship [09/575/(0090)/2011 EMR-I]
We theoretically study the spin-wave spectra in magnonic waveguides periodically patterned with nanoscale square antidots. We show that structural changes breaking the mirror symmetry of the waveguide can close the magnonic bandgap. The effect of these intrinsic symmetry breaking can be compensated by adjusted asymmetric external bias magnetic field, i.e., by an extrinsic factor. This allows for the recovery of the magnonic bandgaps. The described methods can be used for developing parallel models for recovering bandgaps closed due to a fabrication defect. The model developed here is particular to magnonics, an emerging field combining spin dynamics and spintronics. However, the underlying principle of this development is squarely based upon the translational and mirror symmetries, thus, we believe that this idea of correcting an intrinsic defect by extrinsic means, should be applicable to spin-waves in both exchange and dipolar interaction regimes, as well as to other waves in general.
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