We report the magnetic properties of Mg0.2Co0.2Ni0.2Cu0.2Zn0.2O, a high-entropy oxide with rocksalt structure, and the influence of substitutions on these properties. From the magnetic susceptibility and neutron diffraction measurements, we found that this compound exhibits long-range magnetic order below 120 K despite the substantial structuraldisorder. The other rocksalt-type high-entropy oxides with various chemical substitutions were found to host either an antiferromagnetic order or spin-glass state depending on the amount of magnetic ions. The presence of magnetic order for such a disordered material potentially provide a route to explore novel magnetic properties and functions.
@article{arxiv.1902.01825,
title = {Long-range magnetic ordering in rocksalt-type high-entropy oxides},
author = {Marco Polo Jimenez-Segura and Tomohiro Takayama and David Bérardan and Andreas Hoser and Manfred Reehuis and Hidenori Takagi and Nita Dragoe},
journal= {arXiv preprint arXiv:1902.01825},
year = {2019}
}