From caged compounds with isolated U atoms to frustrated magnets with 2- or 3-atom clusters: a review of Al-rich uranium aluminides with transition metals.

Crystal structures and physical properties of four families of Al-rich ternary uranium compounds with transition metals () are reviewed, namely UAl, UAl, UAl, and UAl. The compounds can be described as consisting of 1 (isolated), 2 (dumbbells) or 3 (triangles) uranium atom clusters, surrounded (1-2-20, 1-2-10 and 6-4-43) or not (3-4-12) by large cages, which strongly influence their magnetic and related properties. Indeed, the ground states of the described systems evolve from Curie-like paramagnetism in the case of the phases with well-isolated, single U-atoms, to complex magnetic order or possible frustrated magnetism in the case of the systems with uranium triangles forming a breathing kagome lattice.

Superconductivity in high-entropy alloy system containing Th.

Th-containing superconducting high entropy system with the nominal composition (NbTa)[Formula: see text](MoWTh)[Formula: see text] was synthesized. Its structural and physical properties were investigated by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, specific heat, resistivity and magnetic measurements. Two main phases of alloy were observed: major bcc structure and minor fcc.

Enhanced Superconducting Critical Parameters in a New High-Entropy Alloy NbTiZrTaHf.

The structural and physical properties of the new titanium- and niobium-rich type-A high-entropy alloy (HEA) superconductor Nb0.34Ti0.33Zr0.

Hybrid Chlorides with Methylhydrazinium Cation: [CHNHNH]CdCl and Jahn-Teller Distorted [CHNHNH]CuCl.

The synthesis, structural, phonon, optical, and magnetic properties of two hybrid organic-inorganic chlorides with monoprotonated methylhydrazinium cations (CHNHNH, MHy), [CHNHNH]CdCl (MHyCdCl), and [CHNHNH]CuCl (MHyCuCl), are reported. In contrast to previously reported MHyCl ( = Mn, Ni, and Co) analogues, neither compound undergoes phase transitions. The MHyCuCl has a crystal structure familiar to previous crystals composed of edge-shared 1D chains of the [CuClN] octahedra.

Structural, magnetic and photoluminescence properties of new hybrid hypophosphites: discovery of the first noncentrosymmetric and two cobalt-based members.

Hybrid organic-inorganic perovskites comprising hypophosphite ligands are emerging functional materials exhibiting magnetic, photoluminescence, negative thermal expansion and negative linear compressibility behaviours. This work reports five novel hypophosphite perovskites, [A]M(HPOO) (A = pyrrolidinium (PYR), guanidinium (GUA) and imidazolium (IM); M = Cd and Co). [GUA]Cd(HPOO), [IM]Cd(HPOO), [GUA]Co(HPOO) and [IM]Co(HPOO) belong to the centrosymmetric trigonal 3̄, monoclinic 2/, monoclinic 2/, and orthorhombic space groups, respectively, while [PYR]Cd(HPOO) crystallizes in the noncentrosymmetric orthorhombic space group 2.