High Oxygen Pressure Synthesis and Magnetic and Electrical Properties of Li<SUB>x</SUB>M<SUB>1-x</SUB>Co<SUB>2 </SUB>O<SUB>4</SUB>(M=Co, Zn)
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概要
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The cubic spinel type oxides, Li<SUB>x</SUB>M<SUB>1-x</SUB>Co<SUB>2</SUB>O<SUB>4</SUB> (M=Co, Zn), were synthesized under high oxygen pressures. From the result of crystallographic and magnetic properties, the cation distributions of the present systems were determined to be (Li<SUP>+</SUP><SUB>x</SUB> Co<SUP>2+</SUP><SUB>1-x</SUB>) [Co<SUP>1+</SUP><SUB>2-x</SUB> Co<SUP>4+</SUP><SUB>x</SUB>](0 ?? x ?? 0.4)and (Li<SUP>+</SUP> <SUB>0.22</SUB> Zn<SUP>2+</SUP> <SUB>0.66</SUB> Co<SUP>2+</SUP><SUB>0.12</SUB>)[Co<SUP>1+</SUP> <SUB>1.78</SUB> Co<SUP>4+</SUP> <SUB>0.22</SUB>]O<SUB>4</SUB>. Electrical resistivity data indicate that the electron transport in these systems occurs owing to a hopping mechanism between Co<SUP>+1</SUP> and Co<SUP>4+</SUP> ions located at octahedral site.
- 社団法人 粉体粉末冶金協会の論文
著者
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Ohashi Masao
Hiroshima University
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Shimada Masahiko
Tohoku University
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大橋 正夫
Hiroshima University
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島田 昌彦
Tohoku University