Title :
Using microwave network analyzer and MSW-SER to measure linewidth spectrum in magnetic garnet film from 0.5 to 20 GHz
Author :
Chen, Hao ; Gasperis, P. De ; Marcelli, R.
Author_Institution :
Southwest Inst. of Appl. Magnetics of China, Sichuan, China
fDate :
11/1/1993 12:00:00 AM
Abstract :
A measurement technique, based on the combination of a modern network analyzer and wide-band-tunable magnetostatic wave straight-edge resonators (MSW-SERs), is used to automatically measure the linewidth (ΔH) in yttrium iron garnet (YIG) epilayers at 0.5-20 GHz. Smith chart and voltage standing wave ratio methods are used to determine the half resonance band (Δω). ΔH value is calculated from Δω using resonance conditions of MSW-SERs. A system with insertion loss <0.07 dB and return <-50 dB is set up by an improved calibration. Four pieces of YIG films with thicknesses of 9-120 μm and magnetization of 370-1750 Gs are examined in the range 0.5-20 GHz. The results measured at 9.2 GHz agree well with those obtained by ferromagnetic resonance
Keywords :
garnets; magnetic epitaxial layers; magnetic thin films; magnetostatic wave devices; microwave measurement; microwave spectra of inorganic solids; network analysers; spectral line breadth; yttrium compounds; 0.5 to 20 GHz; 9 to 120 micron; MSW-SER; Smith chart; YFe5O12; YIG; YIG epilayers; YIG films; calibration; ferromagnetic resonance; half resonance band; insertion loss; linewidth spectrum; magnetic garnet film; magnetization; measurement technique; microwave network analyzer; voltage standing wave ratio methods; wide-band-tunable magnetostatic wave straight-edge resonators; Garnets; Insertion loss; Iron; Magnetic analysis; Magnetic resonance; Magnetostatic waves; Measurement techniques; Microwave measurements; Voltage; Yttrium;
Journal_Title :
Magnetics, IEEE Transactions on
