2011/03/24 by Kazuhiro Nawa, Takeshi Yajima, Yoshihiko Okamoto +5 · 1 citation
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Atomic orbital #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Cuprate #Doping #Electron #Ferromagnetism #Ion #Magnetic and transport properties of perovskites and related materials #Molecular orbital #Molecule #Octahedron #Optics #Photonic Crystals and Applications #Photonic and Optical Devices #Physics #Physics of Superconductivity and Magnetism #Plasmonic and Surface Plasmon Research #Quantum mechanics #Radiation #Spins #Superexchange #cond-mat.str-el
paper · pdf · doi:10.1021/acs.inorgchem.5b00686
7 pages, 5 figures published to Inorg. Chem. (2015)
openalex publication_date 2011/03/24 · arxiv created 2015/05/20 · arxiv updated 2015/05/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/06/11
A new spin-1/2 quasi-one-dimensional antiferromagnet KCuMoO4(OH) is prepared by the hydrothermal method. The crystal structures of KCuMoO4(OH) and the already-known Na-analogue NaCuMoO4(OH) are isotypic, comprising chains of Cu(2+) ions in edge-sharing CuO4(OH)2 octahedra. Despite the structural similarity, their magnetic properties are quite different because of the different arrangements of dx(2)-y(2) orbitals carrying spins. For NaCuMoO4(OH), dx(2)-y(2) orbitals are linked by superexchange couplings via two bridging oxide ions, which gives a ferromagnetic nearest-neighbor interaction J1 of -51 K and an antiferromagnetic next-nearest-neighbor interaction J2 of 36 K in the chain. In contrast, a staggered dx(2)-y(2) orbital arrangement in KCuMoO4(OH) results in superexchange couplings via only one bridging oxide ion, which makes J1 antiferromagnetic as large as 238 K and J2 negligible. This comparison between the two isotypic compounds demonstrates an important role of orbital arrangements in determining the magnetic properties of cuprates.