Spin-wave switching using dynamic magnonic crystal

Abstract

In this study, switching of the spin-wave propagation was investigated using an yttrium iron garnet (YIG) waveguide. A dynamic magnonic crystal was designed to control the non-reciprocal surface spin waves. The dynamic magnonic crystal controlled the periodic modulation field on the YIG film and caused a strong Bragg reflection on the surface spin waves. The maximum effect of Bragg reflection was analyzed by the wavelet to be 95% of its intensity. The spin-wave switching by the dynamic magnonic crystal will be a promising method of carrier-flow control for constructing the integrated magnonic circuits.

Mode-dependent magnonic noise

“…Magnonics offers a new class of next-generation information processing (spin-wave computing [1][2][3][4][5][6][7] ). Magnons, the quanta of spin waves, are non-charged information carriers and have been used to develop many magnonic functionalities such as magnon transistors 8 , multiplexers 9 , logic circuits [10][11][12] , switches 13 , and converters 14 . The non-charged magnons release information processing devices from electronic Joule heating and broaden the material design including even electronic insulators.…”

Spin-wave enhancement using feedback-ring structure

“…Research on spin-wave computing (also known as magnonics) has developed numerous functionalities, such as magnon transistor, 6,7) spin-wave logic, 8,9) spin-wave multiplexer, 10,11) and spinwave switch. [12][13][14][15] Majority of these functional devices employ spin-wave modes with in-plane magnetization configurations, such as backward volume spin-waves (BVMSWs) 16,17) and magnetostatic surface spin-waves (MSSWs), 18,19) which can be controlled using the shape magnetic anisotropy and locally generated weak Oersted fields. Therefore, the interconnection between the magnonic functions of BVMSWs and MSSWs has been widely investigated, and various mode conversion methods have been developed.…”