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Radio frequency electrical resistance measurement under destructive pulsed magnetic fields
T Shitaokoshi1, S Kawachi2,3, T Nomura1,4
1Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
The Review of Scientific Instruments
|September 22, 2023
Summary
Researchers developed a novel radio frequency reflection method for precise electrical resistance measurements under extreme pulsed magnetic fields exceeding 100 Tesla. This technique enhances the study of magnetoresistance in high-field physics.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Electrical Engineering
Background:
- Investigating electrical transport properties under extreme conditions is crucial for understanding material behavior.
- Pulsed magnetic fields above 100 Tesla present significant challenges for accurate resistance measurements due to induced noise.
Purpose of the Study:
- To develop a robust method for measuring electrical resistance under destructive pulsed magnetic fields.
- To improve the accuracy of magnetoresistance measurements in ultra-high magnetic fields.
Main Methods:
- Utilized radio frequency (RF) reflection technique for resistance measurement.
- Developed a specialized sample stage with a flexible printed circuit to minimize noise from induced voltages.
- Analyzed reflectance data, including phase information, using admittance charts to determine absolute magnetoresistance values.
Main Results:
- Successfully measured electrical resistance under pulsed magnetic fields exceeding 100 Tesla.
- Demonstrated significant noise reduction through the use of a flexible printed circuit sample stage.
- Accurately determined the absolute value of magnetoresistance by analyzing RF wave reflectance and phase.
Conclusions:
- The developed RF reflection method provides a viable approach for accurate electrical transport characterization in ultra-high pulsed magnetic fields.
- This technique overcomes previous limitations in measuring magnetoresistance under extreme magnetic field conditions.
- Enables more comprehensive studies of material properties in extreme electromagnetic environments.
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