Infra-red absorption spectra of complexes of thiourea
作者:K. Swaminathan、H.M.N.H. Irving
DOI:10.1016/0022-1902(64)80212-8
日期:1964.7
The infra-redabsorptionspectra of complexes of thiourea with manganese, cobalt, nickel, zinc, copper, mercury, cadmium and lead have been interpreted to show the existence of metal to sulphur bond only rather than metal to nitrogen bond.
Shape and phase evolution of nickel sulfide nano/microcrystallines via a facile way
作者:Peng-Fei Yin、Chao Zhou、Xiang-Yu Han、Zheng-Ren Zhang、Chuan-Hui Xia、Li-Li Sun
DOI:10.1016/j.jallcom.2014.09.113
日期:2015.1
Nickel sulfides nano/microcrystallines were synthesized through a facile and efficient single-source method by thermal decomposition the precursor of tetrakis thiourea nickel chloride crystals ( TTNC) complex in a Teflon-lined autoclave. It is found that the reaction temperature, reaction time and relative reaction pressure have important influence on morphology of the final products and pure Ni3S4 can be transformed to NiS2 by increasing the thermal decomposition temperature from 200 degrees C to 250 degrees C under sealed conditions. Meanwhile, infrared absorption, Raman spectrums and magnetic properties of as-prepared cubic Ni3S4 and NiS2 were investigated. (C) 2014 Elsevier B.V. All rights reserved.
Field‐induced magnetic ordering in uniaxial nickel systems: A second example
作者:Armando Paduan‐Filho、Robert D. Chirico、K. O. Joung、Richard L. Carlin
DOI:10.1063/1.441589
日期:1981.4
The zero-field susceptibilities parallel and perpendicular to the tetragonal axis of NiCl2⋅4SC(NH2)2 have been measured between 1.2 and 30 K and fitted to the usual spin Hamiltonian. The resulting parameters are D/kB = 7.6±0.4 K, z0J/kB = −4.5±0.3 K, g∥ = 2.26±0.03 and g⊥ = 2.34±0.03. The susceptibility has also been measured parallel to the tetragonal axis at constant temperatures between 0.3 and 2 K as a function of external field. Magnetic ordering is found to occur, and portions of the phase boundary between paramagnetic and antiferromagnetic states have been determined.