Abstract
A typical Li+ substituted NiO compound, Li0.29Ni0.71O, was synthesized by molten nitrate method. The effects of Li+ substitution on the structure and magnetic properties of NiO were investigated. X-Ray diffraction(XRD), scanning electron microscope(SEM) and high-resolution transmission electron microscope(HRTEM) analyses confirm the cubic structure of Li0.29Ni0.71O, with a primary particle size of 150 nm. Analysis of the Ni X-ray photoelectron spectroscopy(XPS) shows the transformation from Ni2+ to Ni3+ induced by Li+ substitution. Two magnetic transitions were observed at 225 and 55 K which were assigned to the ferrimagnetic ordering and spin glass transition, respectively. The different magnetic behavior with respect to that of NiO was attributed to the break of superexchange interaction Ni2+-O-Ni2+ and the formation of different spin clusters after non-magnetic Li+ doping.
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Supported by the Special Funds for Major National Basic Research Project of China(No.2009CB220104), the National Natural Science Foundation of China(No.11004073) and the Research Fund for the Doctoral Program of Higher Education of China(New Teacher)(No.20090061120020) and Partially Supported by the Development Program of Science and Technology of Jilin Province, China(No.201205035).
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Du, F., Bie, Xf., Bian, Xf. et al. Preparation, structure and magnetic properties of lithium substituted NiO by molten salt method. Chem. Res. Chin. Univ. 29, 210–213 (2013). https://doi.org/10.1007/s40242-013-2159-y
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DOI: https://doi.org/10.1007/s40242-013-2159-y