EFFECTS OF QUENCHING ON THE SUPERCONDUCTIVE PROPERTIES OF THE YBA2CU4O8 (124)-SYSTEM

被引：9

作者：

MAARTENSE, I

SARKAR, AK

KOZLOWSKI, G

机构：

[1] WRIGHT LAB,AERO PROPULS & POWER DIRECTORATE,WRIGHT PATTERSON AFB,OH 45433

[2] UNIV DAYTON,RES INST,DAYTON,OH 45469

来源：

PHYSICA C | 1991年 / 181卷 / 1-3期

关键词：

D O I：

10.1016/0921-4534(91)90330-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Samples of YBa2Cu4O8 (124) sintered and slowly cooled in oxygen at ambient pressure were quenched from 400, 600 and 800-degrees-C. AC susceptibility measurements show that the superconductive transition of the 124 granular phase remains close to T(c) = 81 K after quenching. The bulk, intergranular transition shifts to lower temperature as the quenching temperature is raised. The data are consistent with the presence of a small amount of off-stoichiometric 124 material in the grain boundaries having a T(c) that is sensitive to quench-induced oxygen deficiency. Our interpretation differs from the one given by Graebner et al. (Physica C 173 (1991) 135) but it is supported by their data.

引用

收藏

页码：25 / 29

页数：5

相关论文

共 9 条

[1] TRANSPORT AND MAGNETIC-PROPERTIES OF HIGH-TC YBA2CU3O7-X FILMS [J].

CHUNG, DW ;

MAARTENSE, I ;

PETERSON, TL ;

HEMENGER, PM .

JOURNAL OF APPLIED PHYSICS, 1990, 68 (07) :3772-3774

[2] SENSITIVITY OF TC TO QUENCHING IN YBA2CU4O8-DELTA [J].

GRAEBNER, JE ;

OBRYAN, HM ;

FASTNACHT, RA ;

JIN, S .

PHYSICA C, 1991, 173 (3-4) :135-138

[3] BULK SYNTHESIS OF THE 81-K SUPERCONDUCTOR YBA2CU4O8 AT HIGH OXYGEN-PRESSURE [J].

KARPINSKI, J ;

KALDIS, E ;

JILEK, E ;

RUSIECKI, S ;

BUCHER, B .

NATURE, 1988, 336 (6200) :660-662

[4] STABILITY OF 124-SUPERCONDUCTOR, 123-SUPERCONDUCTOR, AND 247-SUPERCONDUCTOR [J].

MORRIS, DE ;

ASMAR, NG ;

NICKEL, JH ;

SID, RL ;

WEI, JYT ;

POST, JE .

PHYSICA C, 1989, 159 (03) :287-294

[5] BULK SUPERCONDUCTING Y2BA4CU7O15-DELTA AND YBA2CU4O8 PREPARED IN OXYGEN AT 1-ATM [J].

POOKE, DM ;

BUCKLEY, RG ;

PRESLAND, MR ;

TALLON, JL .

PHYSICAL REVIEW B, 1990, 41 (10) :6616-6620

[6] SUPERCONDUCTIVE PROPERTIES OF THE YBA2CU4O8 SUPERCONDUCTOR [J].

SARKAR, AK ;

KOZLOWSKI, G ;

MAARTENSE, I .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1990, 73 (10) :3110-3112

[7] EFFECT OF POSTSINTERING QUENCHING PARAMETERS ON TC AND CRYSTAL-STRUCTURE OF THE BI2SR2CACU2O8+DELTA (2212) PHASE [J].

SARKAR, AK ;

MAARTENSE, I .

PHYSICA C, 1990, 168 (5-6) :591-598

[8] THE EFFECTS OF LONG-TERM ANNEALING ON SUPERCONDUCTING PROPERTIES IN THE BI-SR-CA-CU-O SYSTEM [J].

SARKAR, AK ;

KUMAR, B ;

MAARTENSE, I ;

PETERSON, TL .

JOURNAL OF APPLIED PHYSICS, 1989, 65 (06) :2392-2397

[9] THE EXTENT OF CRITICAL-TEMPERATURE VARIATIONS OF THE SUPERCONDUCTING PHASES IN THE BI-PB-SR-CA-CU-O SYSTEM [J].

SARKAR, AK ;

MAARTENSE, I .

SOLID STATE COMMUNICATIONS, 1991, 77 (02) :121-124