Magnetic Field Meter Based on CMR-B-Scalar Sensor for Measurement of Microsecond Duration Magnetic Field Pulses
Pavel Piatrou, Voitech Stankevic, Nerija Zurauskiene, Skirmantas Kersulis, Mindaugas Viliunas, Algirdas Baskys, Martynas Sapurov, Vytautas Bleizgys, Darius Antonovic, Valentina Plausinaitiene, Martynas Skapas, Vilius Vertelis, Borisas Levitas
TL;DR
This paper introduces a new magnetic field meter using a special sensor to accurately measure short, high-amplitude magnetic pulses with minimal interference.
Contribution
A novel magnetic field measurement system using a CMR-based sensor for high-precision, microsecond-duration pulsed magnetic field measurements.
Findings
The system successfully measured magnetic pulses up to 15 T with durations of 20–30 μs.
Two versions of the measurement unit were developed for different sensor placement distances.
The use of a bipolar pulsed voltage reduced parasitic effects in the probe circuit.
Abstract
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…
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Taxonomy
TopicsMagnetic Field Sensors Techniques · Magneto-Optical Properties and Applications · Magnetic and transport properties of perovskites and related materials