CU VALENCE STATES IN SUPERCONDUCTING BI-PB-SR-CA-CU-O SYSTEM

被引：19

作者：

LIU, HK

DOU, SX

SONG, KH

SORRELL, CC

EASTERLING, KE

JONES, WK

机构：

[1] LULEA UNIV TECHNOL,DEPT ENGN MAT,S-95187 LULEA,SWEDEN

[2] STATE UNIV FLORIDA,COLL ENGN & APPL SCI,MIAMI,FL 33199

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1990年 / 87卷 / 02期

关键词：

D O I：

10.1016/0022-4596(90)90031-R

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The oxidation states of Bi, Pb, and Cu in the BiPbSrCaCuO (BPSCCO) system have been determined by a combination of volumetric measurement technique and iodometric titration. It was found that, in contrast to previous reports, the concentration of the Cu3+ ions decreased with increasing Pb content, and Cu3+ ions were absent in samples of Bi1.6Pb0.4Sr1.6Ca2Cu3O9.8, while a Tc at 108 K and a Jc of greater than 12,000 A/cm2 at 77 K were observed. The 110 K phase in BPSCCO was stabilized and showed a high tolerance to change in oxygen partial pressure during sintering. In Pb-doped materials, Bi appears to be trivalent while Pb was determined to be mixed-valence Pb4+ Pb2+. It is suggested that superconductivity in BPSCCO may result from a dynamic transfer of holes from Bi PbO layers toward CuO2 planes. © 1990.

引用

页码：289 / 297

页数：9

共 24 条

[1]

CHEN LQ, VALENCE COPPER BI TI

[2] LABILE CU-3+ IONS CORRELATED WITH SUPERCONDUCTING PROPERTIES IN YBA2CU3O7-X [J].

DOU, SX ;

LIU, HK ;

BOURDILLON, AJ ;

SAVVIDES, N ;

ZHOU, JP ;

SORRELL, CC .

SOLID STATE COMMUNICATIONS, 1988, 68 (02) :221-225

[3] DIFFUSION GROWN SUPERCONDUCTING THICK-FILMS OF BI-(PB)-SR-CA-CU-O WITH ZERO RESISTANCE AT 103-K [J].

DOU, SX ;

LIU, HK ;

BOURDILLON, AJ ;

TAN, NX ;

SORRELL, CC .

PHYSICA C, 1989, 158 (1-2) :93-96

[4] LABILE CU-3+ IONS IN THE BI-SR-CA-CU-O SYSTEM AND THE EFFECTS OF VARYING THE COMPOSITION AND HEAT-TREATMENT [J].

DOU, SX ;

LIU, HK ;

BOURDILLON, AJ ;

TAN, NX ;

SAVVIDES, N ;

ZHOU, JP ;

SORRELL, CC .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1988, 1 (02) :78-82

[5]

DOU SX, 1989, PHYS REV B, V40, P5286

[6]

DOU SX, UNPUB SUPERCOND SCI

[7] VALENCE BANDS AND ELECTRON CORRELATION IN THE HIGH-TC SUPERCONDUCTORS [J].

FUGGLE, JC ;

WEIJS, PJW ;

SCHOORL, R ;

SAWATZKY, GA ;

FINK, J ;

NUCKER, N ;

DURHAM, PJ ;

TEMMERMAN, WM .

PHYSICAL REVIEW B, 1988, 37 (01) :123-126

[8] STRUCTURAL MODULATION AND SUPERCONDUCTING PROPERTIES IN BI2-XPBXSR2CACU2O8+D AND BI2-YPBYSR2YCU2O8+D [J].

FUKUSHIMA, N ;

NIU, H ;

NAKAMURA, SI ;

TAKENO, S ;

HAYASHI, M ;

ANDO, K .

PHYSICA C, 1989, 159 (06) :777-783

[9] X-RAY ABSORPTION STUDY OF THE O-2P HOLE CONCENTRATION-DEPENDENCE ON O-STOICHIOMETRY IN YBA2CU3OX [J].

KUIPER, P ;

KRUIZINGA, G ;

GHIJSEN, J ;

GRIONI, M ;

WEIJS, PJW ;

DEGROOT, FMF ;

SAWATZKY, GA ;

VERWEIJ, H ;

FEINER, LF ;

PETERSEN, H .

PHYSICAL REVIEW B, 1988, 38 (10) :6483-6489

[10] A COMPARISON OF THE STABILITY OF BI2SR2CACU2O8+Y WITH YBA2CU3O6.5+Y IN VARIOUS SOLUTIONS [J].

LIU, HK ;

DOU, SX ;

BOURDILLON, AJ ;

SORRELL, CC .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1988, 1 (04) :194-197

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