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1Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-422 Wroclaw, Poland.
The Review of Scientific Instruments
|December 3, 2008
Summary
This study details a new inductive magnetometer for measuring magnetic moments in pulsed magnetic fields. The design ensures accurate measurements by providing methods for sensitivity calculation and system calibration.
Area of Science:
- Physics
- Materials Science
- Electrical Engineering
Background:
- Inductive magnetometers require specific frequency characteristics for accurate measurements in pulsed magnetic fields.
- Existing methods for measuring magnetic moments in pulsed fields may lack sufficient sensitivity or calibration accuracy.
Purpose of the Study:
- To describe the construction and calibration of a novel inductive magnetometer for pulsed magnetic field applications.
- To present calculation procedures for determining magnetometer sensitivity and thermal noise.
- To validate the magnetometer's performance with experimental measurements.
Main Methods:
- Detailed construction of an inductive magnetometer with a gradiometer coil set.
- Development of calculation procedures for effective coupling coefficient and thermal noise.
- Experimental measurement of pulse magnetization hysteresis loops for ferromagnetic samples and high-temperature superconductors.
Main Results:
- A method for determining the effective coupling coefficient between coils and samples was established.
- A procedure for calculating thermal noise in the measuring system was presented.
- Experimental hysteresis loops demonstrated the magnetometer's capability in pulsed field measurements.
Conclusions:
- The developed inductive magnetometer provides accurate measurements of magnetic moments in pulsed fields.
- The effective coupling coefficient allows direct correlation between signal and magnetic moment, enabling absolute calibration.
- The magnetometer is suitable for characterizing magnetic properties of various materials under pulsed conditions.
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