In:
Surface Review and Letters, World Scientific Pub Co Pte Ltd, Vol. 09, No. 02 ( 2002-04), p. 1345-1349
Abstract:
Results of X-ray fluorescence measurements of MA 2 Ca n-1 Cu n O 2n + 3 compounds with [ M -12(n-1)n] type structures, ( C 0.8 N 0.2 Sr 2 CuO 5.3 , [ Cu 0.25 (C,N) 0.75 ] Sr 2 CaCu 2 O y , Cu 0.5 V 0.5 Sr 2 CaCu 2 O 7.5 , Cu 0.5 V 0.5 Sr 2 Ca 2 Cu 3 O 9.4 , Cu 0.5 V 0.5 Sr 2 ( Ca 3.6 Sr 0.4 ) Cu 5 O 13.5 and Cu 0.5 V 0.5 Sr 2 ( Ca 4.7 Sr 0.3 ) Cu 6 O 15.3 , are presented. The experiments show that C-atoms form a distorted CO 3 oxyacid group with a partial substitution of copper and nitrogen atoms in the M-sites. We conclude that the CO 3 2- group in (C,N) Sr 2 Ca n-1 Cu n O y and (Cu,C,N) Sr 2 Ca n-1 Cu n O y is substituted by the NO 2 - which induces the creation of the hole carriers in these compounds. We have found that V-atoms in the given compounds form ( VO 4 ) 3- tetrahedrons and have a pentavalent state.
Type of Medium:
Online Resource
ISSN:
0218-625X
,
1793-6667
DOI:
10.1142/S0218625X02003780
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2002
Bookmarklink