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Influence of vanadium doping on the behavior of YBa 2 Cu 3 O 7‐y
Author(s) -
Meng Jian,
Ren YuFang,
Li XiaoGuang,
Popov V. V.,
Repin S. M.,
Smirnov I. A.
Publication year - 1994
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19940120505
Subject(s) - vanadium , chemistry , orthorhombic crystal system , superconductivity , valence (chemistry) , impurity , doping , crystallography , electron , hall effect , analytical chemistry (journal) , electrical resistivity and conductivity , condensed matter physics , inorganic chemistry , crystal structure , physics , organic chemistry , chromatography , quantum mechanics
YBa 3 Cu 3‐x V x O 7‐y ( x =0, 0.1, 0.2, 0.3, 0.4, 0.S and 0.6) superconductors have been prepared. X‐ray diffraction shows that the system remains orthorhombic for all compositions studied, but for x > 0.4 V 2 O 5 was detected at an impurity phase. Substitution of V 5+ for Cu 2+ occurs in the Cu(2) sites on the Cu(2)—O planes. The introduction of the high valence element, vanadium, produces the extra free‐electrons. These electrons recombine with the positive carrier of the system. It makes depression of the mobility and the Hall number of =YBa 2 Cu 3‐x V xO 7‐y and also results in a depression of T C .