Crystal structure, superconductivity and magnetic properties of the superconducting ferromagnets Gd1.4-xDyxCe0.6Sr2RuCu2O10 (x=0 - 0.6)

TL;DR

This study investigates how Dy doping affects the structure, superconductivity, and magnetism of Gd1.4-xDyxCe0.6Sr2RuCu2O10, revealing suppression of superconductivity and enhancement of magnetic ordering with increased Dy content.

Contribution

It provides a systematic analysis of Dy doping effects on the structural, electrical, and magnetic properties of these superconducting ferromagnets, highlighting key changes in transition temperatures.

Findings

Superconducting transition temperature decreases with Dy doping.

Magnetic ordering temperature increases with Dy doping.

Structural changes are minimal except for c/a ratio variation.

Abstract

The structural, electrical and magnetic properties of the superconducting ferromagnets, Gd1.4-xDyxCe0.6Sr2RuCu2O10 (x=0-0.6) are systematically investigated as a function of Dy doping and temperature. These compounds are characterised by high temperature superconductivity (Tc ranging from 20-40 K depending upon the Dy content) coexisting with weak ferromagnetism with two magnetic transitions (TM2 ranging from 95-106 K and TM1 around 120 K). Doping with Dy gives no significant structural changes except for a minor change in the c/a ratio. However the superconducting transition temperature is significantly suppressed and magnetic ordering temperature enhanced on Dy doping. These effects are described and discussed.