Successive phase transitions under high pressure in FeTe0.92

TL;DR

This study investigates how high pressure affects the magnetic and structural properties of FeTe0.92, revealing pressure-induced phase transitions but no emergence of superconductivity up to 19 GPa.

Contribution

It provides the first detailed high-pressure magnetization and resistivity data for FeTe0.92, identifying two distinct pressure-induced phases and contrasting behavior with FeAs-based superconductors.

Findings

Two pressure-induced phases observed at low temperature.

No superconductivity detected up to 19 GPa.

Anomalies in magnetization and resistivity suppressed by pressure.

Abstract

We performed magnetization and electrical resistivity measurements under high pressures of up to 19 GPa for FeTe0.92. The compound shows an anomaly in magnetization and resistivity at atmospheric pressure due to a structural distortion accompanied by a magnetic transition. We also observed magnetic and resistive anomalies under high pressure, suggesting that two pressure-induced phases exist at a low temperature. Unlike in FeAs-based compounds, no superconductivity was detected under high pressures of up to 19 GPa, although the anomaly at atmospheric pressure was suppressed by applying pressure.