Impact of rare earth magnetic moment on ordering of Ru in Sr2RuREO6 (RE = Gd and Eu)

TL;DR

This study investigates how the magnetic moment of rare earth ions Gd and Eu affects the magnetic ordering of Ru in Sr2RuREO6, revealing complex magnetic behaviors influenced by the rare earth's magnetic properties.

Contribution

It provides new insights into the influence of rare earth magnetic moments on Ru magnetic ordering in Sr2RuREO6 compounds.

Findings

Gd/Ru-211O6 shows antiferromagnetic ordering with a ferromagnetic component at 20 K.

Eu/Ru-211O6 maintains antiferromagnetic order down to 5 K without ferromagnetic features.

High magnetic moment of Gd3+ affects Ru's magnetic ordering in Gd/Ru-211O6.

Abstract

We report synthesis and magnetization of Sr2RuREO6 (RE/Ru-211O6) with RE = Gd and Eu. Both Gd,Eu/Ru-211O6 are formed in distorted perovskite-type single phase with monoclinic P21/n space group. Magnetization (M/T) measurements exhibited antiferromagnetic ordering of Ru moments for both Gd and Eu compounds at TN of around 30 K due to super-exchange Ru-O-O-Ru interaction. Interestingly enough, detailed M/H plots of Gd/Ru-211O6 exhibited, the development of a ferromagnetic (FM) component at 20 K. Further at below 10 K, the FM component disappears and rather an spin freezing field (HSF) of around 1000 Oe is seen at 5 K. In case of Eu/Ru-211O6, the basic antiferromagnetic ordering of Ru moments remains invariant down to 5 K, and the appearance of FM component is not seen. It seems that the high magnetic moment of 8mB for Gd3+ influences the AFM ordering of Ru in case of Gd/Ru-211O6.