Co- and contra-directional vertical coupling between ferromagnetic layers with grating for short-wavelength spin wave generation

Abstract

The possibility to generate short spin waves is of great interest in the field of magnonics nowadays. We present an effective and technically affordable way of conversion of long spin waves, which may be generated by conventional microwave antenna, to the short, sub-micrometer waves. It is achieved by grating-assisted resonant dynamic dipolar interaction between two ferromagnetic layers separated by some distance. We analyze criteria for the optimal conversion giving a semi-analytical approach for the coupling coefficient. We show by the numerical calculations the efficient energy transfer between layers which may be either of co-directional or contra-directional type. Such a system may operate either as a short spin wave generator or a frequency filter, moving foreward possible application of magnonics.

References in corpus (5)

• The 2014 Magnetism Roadmap
• Reconfigurable nano-scale spin-wave directional coupler
• Spin wave nonreciprocity and magnonic band structure in thin permalloy film induced by dynamical coupling with an array of Ni stripes
• Broadband magnetoelastic coupling in magphonic crystals for high-frequency nanoscale spin wave generation
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Cited by in corpus (5)

• Spin-wave diode and circulator based on unidirectional coupling
• Experimental Realization of a Passive GHz Frequency-Division Demultiplexer for Magnonic Logic Networks
• Magnonic band gap and mode hybridization in continuous Permalloy film induced by vertical coupling with an array of Permalloy ellipses
• Nonreciprocal spin-wave dynamics in Pt/Co/W/Co/Pt multilayers
• Multifunctional operation of the double-layer ferromagnetic structure coupled by a rectangular nanoresonator