Premium
Phase Formation, Crystal Structure and Electrical Properties of La212 Type Compound Substituted by Silver or Praseodymium
Author(s) -
Tao F.,
Zhou X.J.,
Hao Y.Z.,
Che G.C.,
Zhu S.F.,
Zhao Z.X.
Publication year - 2000
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/(sici)1521-4079(200001)35:1<43::aid-crat43>3.0.co;2-o
Subject(s) - praseodymium , electrical resistivity and conductivity , crystal structure , rietveld refinement , cuprate , crystallography , chemistry , structure type , metal , oxide , phase (matter) , solid state , materials science , inorganic chemistry , doping , organic chemistry , physics , optoelectronics , quantum mechanics
The La212 type compounds substituted by silver or praseodymium are prepared by solid state reaction method. It is found that compounds La 2‐x Sr x Ca 0.5 Pr 0.5 Cu 2 O 6 , La 1.6 Pr 0.4 Ca 1‐x Sr x Cu 2 O 6 and La 2‐x Pr x Ca 0.5 Sr 0.5 Cu 2 O 6 can be formed for x=0.4‐1.1, 0‐0.5 and 0‐1.5, respectively. A new member of La212 type compounds, La 2‐x Ag x CaCu 2 O 6 is also prepared. Their structures are verified by Rietveld structure refinement to belong to the structure type of La212 cuprate oxide with space group I4/mmm. Their electrical properties are investigated. La 1.65 Ag 0.35 CaCu 2 O 6 displays metal‐like behavior and its resistivity decreases with the decrease of temperature from 300K to 4.2K.