Miniature capacitive Faraday force magnetometer for magnetization measurements at low temperatures and high magnetic fields

Abstract

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 (C${}_5$H${}_{12}$N)${}_2$CuBr${}_4$ (BPCB) and NiCl${}_2$$\cdot$4 SC(NH${}_2$)${}_2$ (DTN) demonstrate the device's capabilities. Routinely, a specimen's magnetic moment is measured with a resolution better than $10^{-7}$ Am${}^2$ ($10^{-4}$ emu). The device in miniaturized to fit is almost any cryostat.

References in corpus (5)

• Controlling Luttinger liquid physics in spin ladders under a magnetic field
• Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder
• $z=2$ Quantum Critical Dynamics in a Spin Ladder
• Presaturation phase with no dipolar order in a quantum ferro-antiferromagnet
• One- and three-dimensional quantum phase transitions and anisotropy in Rb${}_2$Cu${}_2$Mo${}_3$O${}_{12}$

Cited by in corpus (9)

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• Magnetic phase diagram of the breathing-kagome antiferromagnet Nd${}_3$BWO${}_9$
• Magnetization plateaux cascade in the frustrated quantum antiferromagnet Cs${}_2$CoBr${}_4$
• Phase diagram and spin waves in the frustrated ferro-antiferromagnet SrZnVO(PO4)2
• Braided Ising spin-tube physics in a purported kagome magnet
• Spin correlations in the frustrated ferro-antiferromagnet SrZnVO(PO4)2 near saturation
• Spin-flop-like transition as quantum critical point in Cs${}_2$RuO${}_4$
• Dynamics and thermodynamics of the S = 5/2 almost Heisenberg triangular lattice antiferromagnet K2Mn(SeO3)2
• Magnetic phase diagram and spin Hamiltonian of antiferromagnet Cs${}_2$CoI${}_4$