La-dilution effects in TbRhIn5 antiferromagnet

TL;DR

This study investigates how La-doping affects the antiferromagnetic properties of TbRhIn5, revealing the robustness of its magnetic structure and the effects of dilution and disorder on its magnetic transition temperature.

Contribution

It provides new insights into the effects of La-induced dilution and disorder on the magnetic properties of TbRhIn5, including the robustness of its magnetic structure under doping.

Findings

TN decreases with La-doping.

Magnetic structure remains stable at certain doping levels.

Disorder influences magnetic interactions.

Abstract

We report measurements of temperature dependent magnetic susceptibility, resonant x-ray magnetic scattering (XRMS) and heat capacity on single crystals of Tb1-xLaxRhIn5 for nominal concentrations in the range 0.0 < x < 1.0. TbRhIn5 is an antiferromagnetic (AFM) compound with TN ~ 46 K, which is the highest TN values along the RRhIn5 series. We explore the suppression of the antiferromagnetic (AFM) state as a function of La-doping considering the effects of La-induced dilution and perturbations to the tetragonal crystalline electrical field (CEF) on the long range magnetic interaction between the Tb$^{3+}$ ions. Additionally, we also discuss the role of disorder. Our results and analysis are compared to the properties of the undoped compound and of other members of the RRhIn5 family and structurally related compounds (R2RhIn8 and RIn3). The XRMS measurements reveal that the commensurate magnetic structure with the magnetic wave-vector (0,1/2,1/2) observed for the undoped compound is robust against doping perturbations in Tb0.6La0.4RhIn5 compound.