Preparation and Characterization of a High-Entropy Magnet, (Mg, Mn, Co, Ni, Cu)TeO.

We report on the synthesis of MgMnCoNiCuTeO, which is isostructural with multiferroic MnTeO (space group ). Study of its magnetic properties indicates establishment of the long-range antiferromagnetic order at 16.3 K, slightly lower than that of pure MnTeO.

Preparation and Properties of a High-Entropy Wolframite-Type Antiferromagnet, (MnCoNiCuCd)WO.

The homogeneous high-entropy wolframite-type solid solution (MnCoNiCuCd)WO was prepared by solid-state reaction at 1000 °C. Elongated "crystals" were grown from the NaWO flux, but their strongly broadened powder X-ray diffraction patterns indicated partial dissolution. Nevertheless, successive annealing of the homogeneous solid solution for 3-4 h at 800, 700, and 600 °C did not bring any sign of dissolution.

Spin-Cluster Glassy and Long-Range Ordered Magnetic States in Honeycomb-Layered Compositionally Complex Oxides NaLiTSbO (T = CuNiCo).

The concept of high-entropy oxides has triggered extensive research of this novel class of materials because their numerous functional properties are usually not mere linear combinations of those of the components. Here, we introduce the new series of compositionally complex honeycomb-layered magnets NaLiTSbO (T = CuNiCo). An unusual feature of the system is its nonmonotonous dependences of the monoclinic lattice parameters and β on .

Monoclinic honeycomb-layered compound Li3Ni2SbO6: preparation, crystal structure and magnetic properties.

Two synthetic routes-ion-exchange preparation from layered Na(3)Ni(2)SbO(6) at 300 °C and direct solid-state synthesis at 1150 °C resulted in layered Li(3)Ni(2)SbO(6), a cation-ordered derivative from the rocksalt type. The Fddd form reported earlier could not be reproduced. According to the XRD Rietveld analysis, Li(3)Ni(2)SbO(6) is a pseudohexagonal monoclinic structure, C2/m, with a = 5.