Automatic System for Determining the Spin Wave Instability Threshold in Ferromagnetic Materials at Microwave Frequencies

Patton, Carl E.; Green, Jerome J.

doi:10.1063/1.1685043

Cited by 10 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, with the measurement of the reflected and injected power of the TE 102 reflection resonator by two directional couplers and power meters, the spin wave linewidth can be obtained [20], but the magnetron needs to be tuned to a minimal output level in the beginning of the measurement and only polycrystalline yttrium iron garnet can be tested with a huge error. Another example is continuous microwave input [21,22], and this method can diminish the required pulse length, thereby avoiding certain deviation when the critical field is determined.…”

Section: Introductionmentioning

confidence: 99%

Spin wave linewidth measurement of microwave ferrite materials using rectangular resonant cavity with adjustable frequency

Wang

Guo

et al. 2015

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Spin wave linewidth measurement of microwave ferrite materials using rectangular resonant cavity with adjustable frequency

Wang

Guo

et al. 2015

Sensors and Actuators A: Physical

View full text Add to dashboard Cite

“…In some situations , the measurement system can be automated to 4 some degree (Patton and Green , 1971).…”

Section: Microwave Cavity Parametersmentioning

confidence: 99%

Microwave Relaxation and Microstructure in Polycrystalline Ferrites.

Patton¹,

White²

1978

Self Cite

View full text Add to dashboard Cite

Measurement of the spin-wave instability threshold hcrit in microwave ferrites

Zhang

Patton

Srinivasan

et al. 1987

Review of Scientific Instruments

View full text Add to dashboard Cite

Several improvements for a previously described semiautomated system for spin-wave instability threshold measurement in microwave ferrites are described. The effects of sample size, sample position in the microwave cavity, and method of data interpretation on the threshold field hcrit are also reported. The data were obtained by the parallel pumping technique at 8.92 GHz. Sphere-shaped samples of polycrystalline yttrium iron garnet were used for the measurements. The results show that the initial, ‘‘exact’’ instability onset, the ‘‘extrapolated’’ onset from the loss increase above threshold, and the ‘‘visual’’ onset estimate from the above threshold response can vary by more than 0.5 Oe for hcrit values of 3 Oe or so. Large samples, above 1 mm in diameter, lead to an overestimation of hcrit due to errors in the microwave cavity perturbation theory analysis which forms the basis of the measurement. The amount of overestimation is about 0.1 Oe for a diameter of 2 mm and 0.2 Oe at 3 mm. Sample position relative to the cavity end wall does not appear to be critical. Imaging effects are small for hcrit measurements in the YIG-like materials of interest here.

show abstract

Automatic System for Determining the Spin Wave Instability Threshold in Ferromagnetic Materials at Microwave Frequencies

Cited by 10 publications

References 1 publication

Spin wave linewidth measurement of microwave ferrite materials using rectangular resonant cavity with adjustable frequency

Spin wave linewidth measurement of microwave ferrite materials using rectangular resonant cavity with adjustable frequency

Microwave Relaxation and Microstructure in Polycrystalline Ferrites.

Measurement of the spin-wave instability threshold hcrit in microwave ferrites

Contact Info

Product

Resources

About