Study on CePtIn4 grown in a platelet-like morphology

TL;DR

This study investigates the structural and electronic properties of CePtIn4 crystals with a platelet-like morphology, revealing differences from needle-shaped crystals and their impact on low-temperature physical behavior.

Contribution

It provides a comprehensive structural analysis and ab-initio electronic structure calculations of CePtIn4 with a new morphology, highlighting its influence on physical properties.

Findings

Larger unit cell volume compared to needle-shaped crystals

Enhanced magnetic ordering temperature (TN = 2.3 K)

Presence of a sharp resistivity drop at TN

Abstract

We present the results of our comprehensive structural investigation performed on single crystals of CePtIn4 grown from In flux in a platelet-like morphology. They were found to crystalize in an orthorhombic structure having space group Cmcm (no. 63) with the lattice parameters a = 4.52175 (15) {\AA}, b = 16.7777 (5) {\AA}, and c = 7.3903 (2) {\AA}. The unit cell volume of such crystals is slightly larger than that of previously reported needle-shaped single crystals of CePtIn4. This feature seems to influence the low-temperature physical properties of the compound, such as enhanced ordering temperature (TN = 2.3 K versus 1.65 K, observed before) along with a sharp drop in the electrical resistivity at TN (that was absent for the needle-like CePtIn4). In addition to the experimental data, we present the results of our ab-initio calculations of the electronic structure of CePtIn4 with the platelet-like morphology.