Title :
Two-Dimensional Magnonic Crystal With Periodic Thickness Variation in YIG Layer for Magnetostatic Volume Wave Propagation
Author :
Chi, K.H. ; Yun Zhu ; Tsai, C.S.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Irvine, Irvine, CA, USA
Abstract :
The propagation characteristics of magnetostatic volume waves (MSVWs), namely, magnetostatic forward volume waves (MSFVWs) and magnetostatic backward volume waves (MSBVWs), in two-dimensional (2-D) magnonic crystals (MCs) with periodic thickness variation of square lattice in YIG layer are reported. The theoretical approach based on Walker´s equation was employed to determine the bandgaps associated with the MSVWs. Experiments were conducted on a 2-D MC with periodic square lattices in YIG layer thickness to measure both the magnetic field-tuned and propagation direction-dependent bandgaps. A very good agreement between the measured and the calculated results was obtained.
Keywords :
energy gap; garnets; magnetostatic waves; magnons; wave propagation; yttrium compounds; 2D magnonic crystal; Walker´s equation; YIG; YIG layer thickness; magnetic field-tuned bandgap; magnetostatic backward volume waves; magnetostatic forward volume waves; magnetostatic volume wave propagation; periodic square lattices; periodic thickness variation; propagation characteristics; propagation direction-dependent bandgap; Crystals; Frequency measurement; Lattices; Magnetosphere; Magnetostatic waves; Magnetostatics; Photonic band gap; 2-D magnonic crystal with periodic thickness variation; Magnetic field-tuned bandgap; magnetostatic volume waves;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2012.2231058
