Updating the phase diagram of the archetypal frustrated magnet Gd3Ga5O12

TL;DR

This study provides a detailed update to the magnetic phase diagram of Gd3Ga5O12, revealing complex interactions and multiple phases due to frustration on a hyperkagome lattice, with implications for understanding magnetic frustration.

Contribution

The paper presents a significantly more detailed and complex phase diagram of Gd3Ga5O12, incorporating new experimental data and revealing additional phase boundaries and interactions.

Findings

Multiple new phase boundaries identified.

Complex interplay of magnetic orders observed.

A multiphase convergence point at 0.9 T and 0.35 K.

Abstract

The applied magnetic field and temperature phase diagram of the archetypal frustrated magnet, Gd3Ga5O12, has been reinvestigated using single crystal magnetometry and polarised neutron diffraction. The updated phase diagram is substantially more complicated than previously reported and can be understood in terms of competing interactions with loops of spins, trimers and decagons, in addition to competition and interplay between antiferromagnetic, incommensurate and ferromagnetic order. Several additional distinct phase boundaries are presented. The phase diagram centers around a multiphase convergence to a single point at 0.9 T and ~ 0.35 K, below which, in temperature, a very narrow magnetically disordered region exists. These data illustrate the richness and diversity that arises from frustrated exchange on the 3 dimensional hyperkagome lattice.