Magnetic phases of a highly frustrated magnet, ZnCr2O4, up to an ultra-high magnetic field of 600 T

TL;DR

This study explores the magnetic phases of ZnCr2O4 under ultra-high magnetic fields up to 600 T, revealing a fully polarized ferromagnetic phase and novel intermediate phases through magneto-optical measurements.

Contribution

It provides the first detailed magnetic phase diagram of ZnCr2O4 in ultra-high magnetic fields, identifying new magnetic phases prior to full polarization.

Findings

Discovered a fully polarized ferromagnetic phase at high fields

Identified a novel magnetic phase above 350 T

Mapped the magnetic phase diagram up to 600 T

Abstract

The Faraday rotation and magneto-optical absorption spectral measurements were conducted to reveal the full-magnetization process and map out a magnetic phase diagram of a typical geometrical frustrated magnet, ZnCr2O4, by using the electromagnetic flux compression method in ultra-magnetic fields up to 600 T. A fully polarized ferromagnetic phase is observed in which the absorption spectra associated with an exciton-magnon-phonon transition disappears. Furthermore, prior to the fully polarized ferromagnetic phase above 410 T, we found a novel magnetic phase above 350 T followed by a canted 3:1 phase.