Pressure induced ferromagnetism in antiferromagnetic Fe_1.03Te

TL;DR

This study reveals that applying hydrostatic pressure to Fe_1.03Te suppresses its antiferromagnetic order and induces a transition to ferromagnetism around 1.7 GPa, with the ferromagnetic transition temperature rising as pressure increases.

Contribution

It demonstrates pressure-induced ferromagnetism in Fe_1.03Te, showing a transition from antiferromagnetic to ferromagnetic order under hydrostatic pressure.

Findings

Antiferromagnetic order decreases with pressure.

Incommensurate magnetic order appears before ferromagnetism.

Ferromagnetic transition temperature increases with pressure.

Abstract

The magnetic properties of Fe1.03Te under hydrostatic pressure up to p ~ 5.7 GPa were investigated by means of muon spin rotation, dc magnetization, and neutron depolarization measurements. With increasing pressure the antiferromagnetic ordering temperature TN decreases continuously from 70 K at ambient pressure towards higher pressures. Surprisingly, the commensurate antiferromagnetic order of FeTe enters a region of incommensurate and dynamical magnetic order before at p ~ 1.7 GPa the system turns ferromagnetic. The ferromagnetic ordering temperature TC increases with increasing pressure.