Determining wave vector and material property from the phase-shift of spin-wave propagation

Abstract

Different to conventional ferromagnetic resonance methods, we use the phase-shift of spin-wave propagation to investigate spin-wave in conducting ferromagnetic thin films. Spinwave wave vector (or wave number) k, a key parameter in the study of spin-wave dispersion and propagation, is extracted from the ratio of the phase-shift to the propagation distance and the ratio of the intercepts to the slopes of the plot of frequency square (f 2 ) vs. the bias field (H). The wave vectors calculated by both methods are in good agreement. The in-plane anisotropy field H k and saturation magnetization MS can also be extracted from the phase-shift map.

Enhanced Transmission through Squeezed Modes in a Self-Cladding Magnonic Waveguide

“…CPW1 (CPW2) is connected to port 1 (port 2) of a vector network analyzer, thus allowing experiments where spin waves are excited by CPW1 through the radio frequency magnetic field h rf , then travel along the propagation distance d ¼ 7:6 m, and are detected by CPW2. The phase shift acquired along d enters the scattering parameter S 21 and allows us to calculate the group velocity v g of the spin wave [27][28][29][30]. The finite width of the CPWs of approximately 800 nm provoked a finite wave vector k along the nanowire in the x direction.…”

Electric-field-induced spin wave generation using multiferroic magnetoelectric cells

“…6 One of the most important requirements for any beyond-CMOS logic device is a low dynamic power consumption per operation. 6,7,9 Spin waves (magnons) have been proposed as a potential means to enable beyond-CMOS computation devices, where propagation and interference of waves in a magnonic waveguide 7,[10][11][12][13] are utilized for information transfer and processing. The potential energy efficiency of spin wave based devices is associated with the wave nature of the information carrier which, unlike charge-based devices, does not necessarily suffer from ohmic losses.…”

Influence of Electric Field on Magnetic Dynamic Properties of Multiferroic Co2FeAl0.5Si0.5/Pb(Mg1/3Nb2/3)0.7Ti0.3O3Heterostructure

“…Both voltage-driven changes in body standing wave and propagating spin wave have been reported. Bao et al 15,16) found that the phase of the propagating spin wave can be modulated by an E field with a finite distance along the surface. However, the voltageinduced change in surface spin wave along the film normal, which is much more sensitive to the interface between FM and FE due to the direct change in boundary conditions, has not been reported.…”