Magnetostatic Propagation in a Dielectric Layered Structure

Abstract

The presence of a conductive plane near a thin magnetic film perturbs the propagation of a surface magnetostatic wave. This paper treats the case of a dielectric layered structure, and an expression for the characteristic dispersion is derived. The dispersion is unique with respect to magnetostatic propagation in that it is nonreciprocal and nonmonotonic. A dielectric layered structure consisting of an epitaxial YIG film separated from a conductive plane by a thin dielectric layer is considered theoretically. Experimental results for this structure are given for dispersion and insertion loss.

Microwave bistability in a magnetostatic wave interferometer with external feedback

“…3(a) also shows a distinct notch near the low frequency edge of the band. This notch is due to a distortion of the MSSW dispersion characteristic because of the metallization on the back side of the alumina substrate [10]. This effect is not critical for the present work.…”

“…The result is (11) The first factor on the right-hand side of (11) is just the -expression from (10). The various parameters of the MSSW circuit all enter in the denominator.…”

Nonlinear Schroedinger equation analysis of MSSW pulse propagation in ferrite-dielectric-metal structure

“…Soliton formation for set II of the NSE coefficients is not possible (gb > 0). Both sets were calculated from the MSSW dispersion equation in a FDM structure [5] using a 14.1 mm thick pure YIG film separated with respect to the metal plate by an air gap h ¼ 200 mm thick [1]. From the numerical analysis it turns out that the output pulse width was practically unchanged for input amplitudes j 0 pj 1 th E0:046; where j 1 th is the threshold amplitude for first-order soliton formation in lossless media [4]: j n th ¼ ðPð2n À 1ÞÞ=ð2V g tÞOðÀb=gÞ; n ¼ 1; 2;y.…”

Effects of an adjacent metal surface on spin wave propagation

“…The in-plane dispersion of spin waves in an infinite slab was treated long ago by Damon and Eshbach [3][4][5][6] where two principal modes were identified: a surface wave, now termed the DamonEshbach (DE) mode, and a so called backward volume (BV) mode. Here we report measurements of the variation of the velocity with wavevector resulting from an adjacent copper film for the DE mode in an insulating ferromagnet, yttrium iron garnet (YIG).…”