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Substitution mechanism and structural study of Ag-doped LiCu2O2
Institution:1. Taras Shevchenko National University of Kyiv, Volodymyrska str., 64\\13, 01601 Kyiv, Ukraine;2. Vilnius University, Sauletekio 9-3, LT-10222 Vilnius, Lithuania;3. Belarusian State University, Nezavisimosti ave., 4, 220030 Minsk, Belarus;4. AlbaNova University center, Stockholm University, SE-10691 Stockholm, Sweden;1. Advanced Membrane Technology Research Centre, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia;2. Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia;3. Department of Materials, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia;4. Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan;5. Fuel Cell Institute (SELFUEL), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
Abstract:Plate-like stoichiometric crystals of Ag-doped LiCu2O2 have been grown by slowly cooling Li2CO3·4(1 – x)CuO·4xAgNO3 (0 ≤ x ≤ 0.5) melts. X-ray single crystal diffraction has shown that the crystals are isostructural with LiCu2O2 and contain around 5 at % Ag (relative to the Cu atoms). The addition of silver to lithium cuprate crystals significantly increases their electrical conductivity but has little effect on the temperature behavior of their magnetic moment. The possible substitution mechanism is determined which supports Ag+ ? Cu+, rather than Ag+ ? Li+ in the Ag-doped LiCu2O2 crystals.
Keywords:Doped lithium cuprate  X-ray diffraction  Twin crystal  Magnetic properties  Multiferroic
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