OXYGEN NONSTOICHIOMETRY AND VALENCES OF BISMUTH AND COPPER IN BI2.00SR1.88CA1.00CU2.14OY

被引：107

作者：

IDEMOTO, Y

FUEKI, K

机构：

[1] Department of Industrial Chemistry, Faculty of Science and Technology, Science University of Tokyo, Noda-shi, Chiba, 278

来源：

PHYSICA C | 1990年 / 168卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(90)90120-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The oxygen nonstoichiometry of Bi2.00Sr1.88Ca1.00Cu2.14Oy was determined as a function of temperature and oxygen partial pressure. It was found that the shape of y-log P02 curves above 800°C is quite different from that below 800°C. Above 800°C, the y-log P02 relation resembled those of other kinds of high Tc superconducting oxides such as Ba2YCu3O7-δ and (La1-xSrx)2CuO4-δ. However, below 800°C y slightly depended on the temperature but did not depend on the oxygen partial pressure. It was found by chemical analysis on quenched samples that the copper valence was 2.07 irrespective of the annealing condition, and the bismuth valence was nearly constant when the annealing temprature was above 800°C but increased with the decrease of the annealing temperature below 800°C. The tailing of resistivity-temperature curves in the vacinity of the critical temperature seemed to be due to the existence of Bi5+ and neutral oxygen species. © 1990.

引用

页码：167 / 172

页数：6

共 9 条

[1] THE INFLUENCE OF OXYGEN ON THE PHYSICAL-PROPERTIES OF THE SUPERCONDUCTING SERIES BI2.1(CAXSR1-X)N+1CUNO2N+4+DELTA [J].

BUCKLEY, RG ;

TALLON, JL ;

BROWN, IWM ;

PRESLAND, MR ;

FLOWER, NE ;

GILBERD, PW ;

BOWDEN, M ;

MILESTONE, NB .

PHYSICA C, 1988, 156 (04) :629-634

[2] OXYGEN NONSTOICHIOMETRY OF A Y(BA1-XSRX)2CU3O7-DELTA SUPERCONDUCTOR [J].

FUEKI, K ;

IDEMOTO, Y ;

ISHIZUKA, H .

PHYSICA C, 1990, 166 (3-4) :261-265

[3] DETERMINATION OF OXYGEN NONSTOICHIOMETRY IN A HIGH-TC SUPERCONDUCTOR BA2YCU3O7-DELTA [J].

KISHIO, K ;

SHIMOYAMA, JI ;

HASEGAWA, T ;

KITAZAWA, K ;

FUEKI, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1987, 26 (07) :L1228-L1230

[4] THE EFFECT OF SINTERING CONDITIONS ON THE FORMATION OF THE HIGH-TC PHASE IN THE BI-SR-CA-CU-O SYSTEM [J].

KOBAYASHI, S ;

SAITO, Y ;

WADA, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1989, 28 (05) :L772-L774

[5] A NEW HIGH-TC OXIDE SUPERCONDUCTOR WITHOUT A RARE-EARTH ELEMENT [J].

MAEDA, H ;

TANAKA, Y ;

FUKUTOMI, M ;

ASANO, T .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1988, 27 (02) :L209-L210

[6] REACTIONS OF THE MONOXIDES OF CARBON AND NITROGEN OVER THE SUPERCONDUCTING LANTHANOID MIXED-OXIDE YBA2CU3OY [J].

MIZUNO, N ;

YAMATO, M ;

MISONO, M .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1988, (13) :887-888

[7] NONSTOICHIOMETRY OF THE PEROVSKITE-TYPE OXIDE LA1-XSRXCRO3-DELTA [J].

MIZUSAKI, J ;

YAMAUCHI, S ;

FUEKI, K ;

ISHIKAWA, A .

SOLID STATE IONICS, 1984, 12 (MAR) :119-124

[8]

ONO A, 1988, JPN J APPL PHYS PT 2, V27, P786

[9]

TANAKA Y, 1988, JPN J APPL PHYS, V27, P548

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