Synthesis and superconducting properties of the iron oxyarsenide TbFeAsO0.85

TL;DR

This study reports the synthesis of a high-quality TbFeAsO0.85 sample exhibiting bulk superconductivity at 42 K, achieved through high-pressure synthesis without F doping, expanding understanding of iron oxyarsenide superconductors.

Contribution

The paper introduces a new synthesis method for TbFeAsO0.85 that demonstrates superconductivity without F doping, highlighting a novel approach in iron oxyarsenide research.

Findings

Bulk superconductivity at 42 K confirmed

High-pressure synthesis yields high-quality samples

Superconductivity achieved without F doping

Abstract

The iron oxyarsenide TbFeAsO0.85 was synthesized by a high-pressure method. A high-quality polycrystalline sample was obtained and characterized by measurements of magnetic susceptibility and electrical resistivity. Bulk superconductivity with Tc of 42 K was clearly established without an F doping usually conducted to tune on superconductivity in the iron oxypnictide.