Composite Pressure Cell for Pulsed Magnets

TL;DR

This paper introduces a novel insulating composite diamond-anvil cell capable of withstanding high pressures up to 9 GPa in pulsed magnetic fields up to 65 T, minimizing eddy current heating and enabling rapid pressure changes at cryogenic temperatures.

Contribution

A new composite diamond-anvil cell design reduces eddy currents and heating in pulsed magnetic fields, allowing high-pressure experiments with rapid adjustments at cryogenic temperatures.

Findings

Operates effectively up to 65 T magnetic fields.

Minimizes inductive heating in pulsed magnetic environments.

Supports measurements at temperatures as low as 500 mK.

Abstract

Extreme pressures and high magnetic fields can affect materials in profound and fascinating ways. However, large pressures and fields are often mutually incompatible; the rapidly changing fields provided by pulsed magnets induce eddy currents in the metallic components used in conventional pressure cells, causing serious heating, forces and vibration. Here we report a diamond-anvil-cell made mainly out of insulating composites that minimizes inductive heating while retaining sufficient strength to apply pressures of up to 9 GPa. Any residual metallic components are made of low-conductivity metals and patterned to reduce eddy currents. The simple design enables rapid sample or pressure changes, desired by pulsed-magnetic-field-facility users. The pressure cell has been used in pulsed magnetic fields of up to 65 T with no noticeable heating at cryogenic temperatures. Several measurement techniques are possible inside the cell at temperatures as low as 500 mK.