Journal
PURE AND APPLIED CHEMISTRY
Volume 83, Issue 11, Pages 1989-2001Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1351/PAC-CON-11-03-06
Keywords
ferromagnets; ferromagnetic resonance; magnetic properties; magnonics; magnonic crystals; micromagnetic; nanodevices; nanostructured materials; nanowires; spin waves; thin films; transition metals
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Funding
- European Community [FP7/2007-2013, 228673, SFB 668]
- Nanospintronics of the City of Hamburg
- German Excellence Cluster Nanosystems Initiative Munich
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Spin-wave (SW) modes are addressed which are confined in thin individual Ni80Fe20 nanowires with widths ranging from 220 to 360 nm. In periodic arrays with an edge-to-edge separation of down to 100 nm, confined modes of neighboring nanowires are found to couple coherently and form allowed minibands and forbidden frequency gaps. This gives rise to a one-dimensional magnonic crystal. We present all-electrical SW spectroscopy data and micromagnetic simulations. We find that the nanowire arrays allow us to reprogram the relevant magnonic band structure via the magnetic history. A forbidden frequency gap of up to about 1 GHz is controlled by an in-plane magnetic field being as small as a few mT.
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