Ferromagnetic Kondo lattice behavior in Ce11Pd4In9

TL;DR

This study investigates the ferromagnetic and Kondo lattice behaviors of Ce11Pd4In9, revealing complex low-temperature magnetic ordering, Kondo effects, and strong electron correlations in this novel compound.

Contribution

It reports the discovery and detailed characterization of ferromagnetic Kondo lattice behavior in Ce11Pd4In9, a compound with a novel crystal structure and complex magnetic properties.

Findings

Ferromagnetic ordering at 18.6 K

Kondo effect dominates electrical transport in the paramagnetic region

Strong electron-electron correlations at low temperatures

Abstract

We report on the low-temperature physical properties of a novel compound Ce$_{11}$Pd$_4$In$_9$ that crystallizes with the orthorhombic Nd$_{11}$Pd$_4$In$_9$-type crystal structure (space group $Cmmm$). The compound exhibits ferromagnetic ordering at $T_{\rm {C}}$ = 18.6 K and an order-order transition at $T_{\rm {t}}$ $\sim$~1.6 K, as inferred from the low-temperature magnetic susceptibility, heat capacity and electrical resistivity data. In the paramagnetic region, the electrical transport in Ce$_{11}$Pd$_4$In$_9$ is dominated by Kondo effect. Below $T_{\rm {C}}$, a distinct contribution due to ferromagnetic spin waves dominates the electrical resistivity data, while at the lowest temperatures, the electrical transport and thermodynamic properties are governed by strong electron-electron correlations. The features observed conjointly hint at strongly correlated ground state in Ce$_{11}$Pd$_4$In$_9$ .