High-Tc Superconductivity in some Heavy Rare-earth Iron-arsenide REFeAsO1-delta(RE = Ho, Y, Dy and Tb) Compounds

TL;DR

This paper reports the successful synthesis of new heavy rare-earth iron-arsenide superconductors REFeAsO1-delta with high critical temperatures, using a high-pressure rapid quenching method, expanding the family of high-Tc superconductors.

Contribution

It introduces a novel synthesis technique for heavy rare-earth iron-arsenide superconductors with high critical temperatures.

Findings

Superconducting transition temperatures up to 52.2 K.

Effective high-pressure rapid quenching synthesis method.

Potential for new high-Tc superconductor materials.

Abstract

New iron-arsenide superconductors of REFeAsO1-delta (RE = Ho, Y, Dy and Tb) were successfully synthesized by a high pressure synthesizing method with a special rapid quenching process, with the onset superconducting critical temperatures at 50.3 K, 46.5 K, 52.2K and 48.5 K for RE = Ho, Y, Dy and Tb respectively.