Generation of Sr2Ca(n-1)CunOy phases (n=5-7) by high pressure synthesis

被引：5
|
作者：
Aoba, Tomoya [1 ]
Kato, Takahito [1 ]
Suzuki, Tsuneo [1 ]
Nakayama, Tadachika [1 ]
Suematsu, Hisayuki [1 ]
Niihara, Koichi [1 ]
机构：
[1] Nagaoka Univ Technol, Extreme Energy Dens Res Inst, Nagaoka, Niigata 9402188, Japan
来源：
JOURNAL OF APPLIED PHYSICS | 2013年 / 114卷 / 19期
基金：
日本学术振兴会;
关键词：
CU-O SYSTEM; 02(N-1)N HOMOLOGOUS SERIES; T-C; SUPERCONDUCTING PROPERTIES; APICAL OXYGEN; N SUPERCONDUCTORS; DERIVATIVE PHASE; CHARGE-RESERVOIR; TEMPERATURE; (SR; CA)(3)CU2O4+DELTA-CL2-Y;
D O I：
10.1063/1.4832779
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We prepared Sr2Ca(n-1)CunOy (n = 3-7) phases using a high-pressure apparatus. In the Sr-Ca-Cu-O system, the n = 5-7 members of a homologous series, Sr2Ca(n-1)CunOy, were prepared as mixed phases for the first time. The c-axis length increases linearly with increasing n; c = 6.46(n-1) + 14.3 angstrom. Half of this slope gives reasonable value of 3.2 angstrom as the thickness of a Ca and CuO2 plane. It is likely that a 0((Sr))2(n-1)n phase is formed from a 0((Sr))2(n-2)(n-1) phase to intercalate CaCuO2 into its infinite layer because the number of CuO2 planes increases with increasing sintering temperature and synthetic time. Too high temperature and too long synthesis time result in the formation of the infinite layer phase. (C) 2013 AIP Publishing LLC.
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页数：6
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