Phase formation, crystal structure and electrical properties of La212 typecompound substituted by silver or praseodymium

Authors
Tao, F Zhou, XJ Hao, YZ Che, GC Zhu, SF Zhao, ZX
Citation
F. Tao et al., Phase formation, crystal structure and electrical properties of La212 typecompound substituted by silver or praseodymium, CRYST RES T, 35(1), 2000, pp. 43-52
Citations number
25
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
CRYSTAL RESEARCH AND TECHNOLOGY
ISSN journal
02321300 → ACNP
Volume
35
Issue
1
Year of publication
2000
Pages
43 - 52
Database
ISI
SICI code
0232-1300(2000)35:1<43:PFCSAE>2.0.ZU;2-2
Abstract
The La212 type compounds substituted by silver or praseodymium are prepared by solid state reaction method. It is found that compounds La2.xSrxCa05Pr0 .5Cu2O6, La1.6Pr0.4Ca1-xSrxCu2O6 and La2-xPrxCa0.5Sr0.5Cu2O6 can be formed for x=0.4-1.1, 0-0.5 and 0-1.5, respectively. A new member of La212 type co mpounds, La2-xAgxCaCu2O6 is also prepared. Their structures are verified by Rietveld structure refinement to belong to the structure type of La212 cup rate oxide with space group I4/mmm. Their electrical properties are investi gated. La1.65Ag0.35CaCu2O6 displays metal-like behavior and its resistivity decreases with the decrease of temperature from 300K to 4.2K.