Theory of Magnetostatic Waves

Abstract

Library of Congress Cataloging-in-Publication Data Stancil, Daniel D.Theory of magnetostatic waves / Daniel D. Stancil p.cm. Includes bibliographical references and index.

Oscillatory Energy Exchange between Waves Coupled by a Dynamic Artificial Crystal

“…It is shown that the process is one of oscillatory inter-modal energy exchange. We explore the features of the effect experimentally using spin waves (magnetic excitations, the quanta of which are known as magnons [15,17]) in a dynamic magnonic crystal (DMC) [8,14,15], and show that results are consistent with a theoretical description of the coupling phenomenon which models the waves as interacting harmonic oscillators.…”

“…Under these conditions, the DMC is "on" and has a band gap corresponding to the wavevectors ±k a = ±π/a = ±105 rad cm −1 which appears as a discontinuity in the spin-wave dispersion relationship centered on the resonance frequency ω(±k a ) = ω a = 2π · 6500 MHz (solid lines, Fig. 1(c)) [17,18]. The band-gap width is determined by ∆B 0 (∼ 1 mT in our experiments) and thus the current amplitude.…”

Attenuation of propagating spin wave induced by layered nanostructures

“…[4][5][6][7][8][9][10][11][12][13][14] The magnetostatic surface wave (MSSW) in the FeNi film is the promising mode due to its high propagation velocity and a non-reciprocal character, which was also observed a long time ago in YIG films. [3][4][5] As revealed in the previous letter, 6 the nonreciprocal emission can be utilized for an initial input, since the non-reciprocal parameter (j) is unchanged even if a spin wave propagates a long distance. For the signal processing with spin wave, furthermore, the control of spin wave amplitude after the emission is of great importance.…”

Simulation Results on a New Non Symmetrical Coplanar Isolator Structure Using Magnetic Thin Film

“…In our isolator design (see Figure 1), the coplanar line and the thin copper layer constitute a waveguide filled with ferrite on one side of the line. So, when the field displacement takes place (for backward propagation), important losses occur which could due to several phenomenon like gyromagnetic resonance (predominant real part of the propagation constant), magnetostatic waves (forward volume waves) [10,11] . .…”