Oxygen nonstoichiometry in copper iron oxide [CuFeO2+delta] single crystals

被引:17
作者
Zhao, TR
Hasegawa, M
Takei, H
机构
[1] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN
[2] OSAKA UNIV,FAC SCI,TOYONAKA,OSAKA 560,JAPAN
关键词
D O I
10.1016/S0022-0248(97)00187-5
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
Compositional, structural, and density measurements have been carried out on CuFeO2+delta single crystals grown under surrounding atmospheres of CO2, Ar, and Ar containing oxygen (Ar + 0.5% O-2, Ar + 1% O-2, and Ar + 2% O-2) by means of the traveling Cu2O-solvent floating-zone method. The crystal grown in Ar + 0.5% O-2 atmosphere shows the stoichiometric composition, while reducing and oxidizing atmospheres result in oxygen nonstoichiometry in CuFeO2+delta single crystals, with the component changing either from Cu1.00Fe1.00O1.86 to Cu1.00Fe1.00O2.06 or from Cu1.00Fe1.00O1.94 to Cu1.00Fe1.00O2.08. With increase in oxygen content, the a(k)-axis extends from 3.0311 to 3.0325 Angstrom and the c(k)-axis compresses from 17.154 to 17.149 Angstrom, while the structural symmetry does not change.
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页码:55 / 60
页数:6
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