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 to measure 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 Am2 (10−4 emu). The device in miniaturized to fit is almost any cryostat.
@article{arxiv.2002.10168,
title = {Miniature capacitive Faraday force magnetometer for magnetization measurements at low temperatures and high magnetic fields},
author = {Dominic Blosser and Leonardo Facheris and Andrey Zheludev},
journal= {arXiv preprint arXiv:2002.10168},
year = {2020}
}