Title Magnetic field meter based on CMR-B-scalar sensor for measurement of microsecond duration magnetic field pulses /
Authors Piatrou, Pavel ; Stankevič, Voitech ; Žurauskienė, Nerija ; Keršulis, Skirmantas ; Viliūnas, Mindaugas ; Baškys, Algirdas ; Šapurov, Martynas ; Bleizgys, Vytautas ; Antonovič, Dariuš ; Plaušinaitienė, Valentina ; Skapas, Martynas ; Vertelis, Vilius ; Levitas, Borisas
DOI 10.3390/s25061640
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Is Part of Sensors: This article belongs to the special issue magnetic field sensing and measurement techniques.. MDPI AG. 2025, vol. 25, iss. 6, art. no. 1640, p. 1-17.. eISSN 1424-8220
Keywords [eng] magnetic field sensors ; colossal magnetoresistance ; magnetic field measurement system ; parasitic electromotive force ; pulsed magnetic field ; magnetic field dynamics ; magnetic pulse welding
Abstract [eng] This study presents a system for precisely measuring pulsed magnetic fields with high amplitude and microsecond duration with minimal interference. The system comprises a probe with an advanced magnetic field sensor and a measurement unit for signal conversion, analysis, and digitization. The sensor uses a thin nanostructured manganite La-Sr-Mn-O film exhibiting colossal magnetoresistance, which enables precise magnetic field measurement independent of its orientation. Films with different compositions were optimized and tested in pulsed magnetic fields. The measurement unit includes a pulsed voltage generator, an ADC, a microcontroller, and an amplifier unit. Two versions of the measurement unit were developed: one with a separate amplifier unit configured for the sensor positioned more than 1 m away from the measurement unit, and the other with an integrated amplifier for the sensor positioned at a distance of less than 0.5 m. A bipolar pulsed voltage supplying the sensor minimized the parasitic effects of the electromotive force induced in the probe circuit. The data were transmitted via a fiber optic cable to a PC equipped with a special software for processing and recording. Tests with 20–30 μs pulses up to 15 T confirmed the effectiveness of the system for measuring high pulsed magnetic fields.
Published MDPI AG
Type Journal article
Language English
Publication date 2025
CC license CC license description