Digital method of pulsed-high-field magnetoresistive measurements based on finite impulse response filters

Abstract A magnetoresistive technique has been developed for a pulsed fields facility with fields up to 60 T. The digital approach for obtaining reliable signal-to-noise ratio results by means of four-probe AC measuring technique is presented. The algorithm based on a finite impulse response filter has been applied for the treatment of a magnetoresistive data. The filtering has been built around the zero-phase delay Parks–McClellan filter implementation. The digital approach has been successfully tested with measurements on a superconducting bulk YBa 2 Cu 3 O 7− x .