METHOD FOR DETECTION OF SPEED OF MAGNETIC VORTEX FLOW IN SECOND-TYPE SUPERCONDUCTORS Russian patent published in 1997 - IPC

FIELD: cryogenic microwave electronic devices. SUBSTANCE: superconductor is subjected to spin wave which power is in range of 1-100 mcW and frequency is in range of 2-8 GHz. Then amplitude-frequency and phase-frequency responses are measured; amplitude-frequency response is used for detection of absorption frequency F0 of spin wave by magnetic vortex flow. Measured phase-frequency response is used for calculation of traveling speed of spin wave V0 for absorption frequency F0. Then current which level is in range of 0 to 1 of critical level. Then amplitude-frequency response is measured again and used for calculation of spin wave absorption frequency F*o

for traveling magnetic vortex flow. Speed of magnetic vortex flow is calculated by equation: V_PMB= (F*o-F_o)*V_o/F_o.. EFFECT: increased precision, decreased cost. 3 dwg