title: Hydrothermal Synthesis and Magnetic Characterization of the Quaternary Oxide CoMo2Sb2O10.
abstract: The new quaternary layered oxide CoMo2Sb2O10was synthesized by hydrothermal synthesis techniques, and its structure was determined from single-crystal X-ray diffraction data. CoMo2Sb2O10crystallizes in the monoclinic space group C2/c with one Sb3+, Mo6+, and Co2+atom site per unit cell, respectively. The crystal structure contains building units consisting of [Co2O8]n, [Mo2O8]n, and [SbO2]nchains. These are connected through corner sharing to form charge-neutral [CoMo2Sb2O10]nlayers. Thermal decomposition of CoMo2Sb2O10starts at 550 °C. The magnetic susceptibility follows a Curie-Weiss law above 50 K with a Curie constant of C = 3.46 emu·K·mol-1corresponding to an effective moment of μeff= 5.26 μBper cobalt atom and a Curie-Weiss temperature θ = -13.2 K. Short-range anti-ferromagnetic ordering dominates below 5 K. Magnetic susceptibility and heat capacity data can be successfully modeled by the predictions from an Ising linear chain with an intrachain spin exchange of ca. -7.8 K.
authors: Department of Materials and Environmental Chemistry, Stockholm University , SE-106 91 Stockholm, Sweden.
authors: Sk Imran
authors: SI
authors: Ali
authors: Max Planck Institute for Solid State Research , Heisenbergstrasse 1, D-70568 Stuttgart, Germany.
authors: Reinhard K
authors: RK
authors: Kremer
authors: Department of Materials and Environmental Chemistry, Stockholm University , SE-106 91 Stockholm, Sweden.
authors: Mats
authors: M
authors: Johnsson