Evolution of magnetism in Pd-substituted Ce$_2$RhIn$_8$ single crystals

TL;DR

This study investigates how substituting Pd into Ce$_2$RhIn$_8$ affects its magnetic and superconducting properties, revealing the suppression of antiferromagnetism and the emergence of superconductivity at specific compositions.

Contribution

It provides a comprehensive analysis of the magnetic and superconducting evolution across the entire Pd concentration range in Ce$_2$Rh$_{1-x}$Pd$_x$In$_8$ single crystals.

Findings

Antiferromagnetism decreases with Pd substitution and vanishes at x ≥ 0.45.

Superconductivity is observed only in Ce$_2$PdIn$_8$.

The Néel temperature drops as Pd concentration increases.

Abstract

The evolution of magnetism and superconductivity in Ce$_2$Rh$_{1-x}$Pd$_x$In$_8$ solid solutions has been studied within the entire concentration range by means of thermodynamic and magnetic measurements at ambient pressure and at temperatures between 0.35 K and room temperature. For this purpose, single crystals with Pd concentrations x = 0, 0.10, 0.15, 0.30, 0.45, 0.55, 0.85 and 1 have been grown from In self-flux and characterized by x-ray diffraction and microprobe analysis. Starting from the antiferromagnet Ce$_2$RhIn$_8$, the N\'eel temperature gradually decreases with increasing Pd concentration and the antiferromagnetism has disappeared for $x \ge 0.45$. Superconductivity has been observed only for Ce$_2$PdIn$_8$.