High pulsed magnetic field sensor based on La-Ca-Mn-O thin polycrystalline films

Abstract

It is demonstrated that polycrystalline La0.33Ca0.67MnO3 thin film sensors can be used to measure pulsed strong magnetic fields with microsecond duration rise and decay times. The response characteristics of these sensors were investigated using 0.7-1.0 ms duration bell-shaped magnetic field pulses of 10-20 T amplitudes and by using special waveform magnetic field pulses with amplitudes of 40 T and decay times of 50 mus. The response of these magnetic field sensors was compared with those of conventional loop sensors and Faraday rotation sensors using Bi12SiO20 single crystals as a known standard.