Miniature capacitive Faraday force magnetometer for magnetization measurements at low temperatures and high magnetic fields.
- Resource Type
- Article
- Authors
- Blosser, Dominic; Facheris, Leonardo; Zheludev, Andrey
- Source
- Review of Scientific Instruments. Jul2020, Vol. 91 Issue 7, p1-6. 6p. 1 Black and White Photograph, 1 Diagram, 2 Graphs.
- Subject
- *PYROMETRY
*MAGNETIC fields
*MAGNETIZATION measurement
*FARADAY effect
*MAGNETOMETERS
*ANISOTROPIC crystals
- Language
- ISSN
- 0034-6748
A Faraday force magnetometer is presented for measurements of magnetization at temperatures down to 100 mK and in magnetic fields up to 14 T. The specimen is mounted on a flexible cantilever forming a force-sensing capacitor in combination with a fixed back plate. Two different cantilever designs are presented. A torsion resistant cantilever allows us to measure the magnetization of highly anisotropic single crystal samples. Measurements of the metal organic quantum magnets (C5H12N)2CuBr4 (BPCB) and NiCl2 · 4 SC(NH2)2 (DTN) demonstrate the device's capabilities. Routinely, a specimen's magnetic moment is measured with a resolution better than 10−7 A m2 (10−4 emu). The device is miniaturized to fit in almost any cryostat. [ABSTRACT FROM AUTHOR]