Ultrasound measurement technique for the single-turn-coil magnets

TL;DR

This paper introduces an ultrasound measurement technique combined with single-turn coils capable of generating magnetic fields over 100 T, enabling the study of field-induced phase transitions and critical phenomena in condensed matter physics.

Contribution

The paper presents a novel ultrasound measurement method integrated with high-field single-turn coils, expanding the capabilities for studying magnetic phenomena at ultra-high magnetic fields.

Findings

Successful ultrasound measurements on MnCr2S4, Cu6[Si6O18]6H2O, and liquid oxygen.

Resolution of relative sound-velocity change estimated at ~10^-3.

Technique enables investigation of phase transitions at magnetic fields exceeding 100 T.

Abstract

Ultrasound is a powerful means to study numerous phenomena of condensed-matter physics as acoustic waves couple strongly to structural, magnetic, orbital, and charge degrees of freedom. In this paper, we present such technique combined with single-turn coils (STC) which generate magnetic fields beyond 100 T with the typical pulse duration of 6 us. As a benchmark of this technique, the ultrasound results for MnCr2S4, Cu6[Si6O18]6H2O, and liquid oxygen are shown. The resolution for the relative sound-velocity change in the STC is estimated as Delta v/v~10^-3, which is sufficient to study various field-induced phase transitions and critical phenomena.