NiCrAl piston-cylinder cell for magnetic susceptibility measurements under high pressures in pulsed high magnetic fields

TL;DR

This paper presents a NiCrAl pressure cell compatible with pulsed high magnetic fields up to 51 T and 2.1 GPa, enabling precise magnetic susceptibility measurements without signal interference.

Contribution

The authors developed a novel NiCrAl pressure cell integrated with a PDO system for high-field, high-pressure magnetic susceptibility measurements, minimizing heating and signal overlay issues.

Findings

Temperature remains near 1.4 K up to 80% of maximum field.

Demonstrated pressure-dependent magnetization in Ba3CoSb2O9.

Effective measurement of magnetic properties under extreme conditions.

Abstract

We developed a metallic pressure cell made of nickel-chromium-aluminum (NiCrAl) for use with a non-destructive pulse magnet and a magnetic susceptibility measurement apparatus with a proximity detector oscillator (PDO) in pulsed magnetic fields of up to 51 T under pressures of up to 2.1 GPa. Both the sample and sensor coil of the PDO were placed in the cell so that the magnetic signal from NiCrAl would not overlay the intrinsic magnetic susceptibility of the sample. A systematic investigation of the Joule heating originating from metallic parts of the pressure cell revealed that the temperature at the sample position remains at almost 1.4 K until approximately 80 $\%$ of the maximum applied magnetic field ($H_{\rm max}$) in the field-ascending process (e.g., 40 T for $H_{\rm max}$ of 51 T). The effectiveness of our apparatus was demonstrated, by investigating the pressure dependence of the magnetization process of the triangular-lattice antiferromagnet Ba$_3$CoSb$_2$O$_9$.