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Nancy Anna Anasthasiya A. Murugesan S. Prabhu E. Sivaraman N. Gnanasekar K.I. 《Journal of the American Ceramic Society》2022,105(6):3820-3826
A p-type rhombohedral AgCoO2 (S.G. ) reported to form only at pressures greater than 300 MPa at 773 K, is stabilized in pure phase at 0.2 MPa oxygen pressure. Analysis of powder X-ray diffraction pattern by Rietveld and selected area electron diffraction patterns confirms the purity of rhombohedral phase. Core-shell X-ray photoemission spectroscopy studies show that Ag ions are in +1 oxidation state with Co ions largely in +3 state. AgCoO2 is paramagnetic undergoing super-paramagnetic transition at 44 K. The magnetic moment of Co is 0.001 μB which corresponds to low spin (LS) Co3+ along with a small fraction of LS Co4+ ions. 相似文献
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