EFFECT OF AG2O ADDITIVE ON MICROSTRUCTURE AND SUPERCONDUCTIVITY OF THE TL2BA2CA2CU3OY COMPOUND

被引:6
作者
KOO, HS
HURNG, WM
LEE, WH
TSENG, TY
CHEN, M
LO, JR
机构
[1] IND TECHNOL RES INST,MAT RES LABS,CHUTUNG 310,TAIWAN
[2] NATL CHIAO TUNG UNIV,INST ELECTR,HSINCHU 300,TAIWAN
[3] MING HSIN ENGN COLL,DEPT CHEM ENGN,HSINCHU 304,TAIWAN
关键词
D O I
10.1063/1.109069
中图分类号
O59 [应用物理学];
学科分类号
摘要
A series of Ag-doped Tl2Ba2Ca2Cu3Oy superconducting Oxides were prepared by a solid-state reaction and the influence of Ag2O content, with a varying molar ratio which ranged from 0 to 1.0, was also investigated. The normal-state resistance of the samples decreased with an increase in the content of Ag2O additive, while the critical superconducting temperatures of the Ag-doped samples increased once the Ag2O content was increased. The doping of the silver oxide was indicated from the results of the x-ray diffraction pattern to be favorable to the formation of the three CuO layers with a high-T(c) phase T12Ba2Ca2Cu3Oy. The diamagnetic Property of the samples was also confirmed by the magnetic measurements to become enhanced by doping with silver oxide. The platelike grains of Tl2 Ba2CaCu2Oy phase Were Observed from scanning electron micrographs to be primarily present in the undoped sample, while the amount of the needlelike Tl2Ba2Ca2Cu3Oy grain increased with an increase in the doping amount of Ag2O.
引用
收藏
页码:3354 / 3356
页数:3
相关论文
共 11 条
[1]   EFFECT OF CA2PBO4 ADDITIONS ON THE FORMATION OF THE 110-K PHASE IN BI-PB-SR-CA-CU-O SUPERCONDUCTING CERAMICS [J].
CHEN, FH ;
KOO, HS ;
TSENG, TY .
APPLIED PHYSICS LETTERS, 1991, 58 (06) :637-639
[2]  
Huang C. Y., 1989, Modern Physics Letters B, V3, P525, DOI 10.1142/S0217984989000844
[3]   SUPERCONDUCTIVITY IN THE BI-SR-CA-CU-O COMPOUNDS WITH NOBLE-METAL ADDITIONS [J].
JIN, S ;
SHERWOOD, RC ;
TIEFEL, TH ;
KAMMLOTT, GW ;
FASTNACHT, RA ;
DAVIS, ME ;
ZAHURAK, SM .
APPLIED PHYSICS LETTERS, 1988, 52 (19) :1628-1630
[4]  
Koo H.-J., UNPUB
[5]   IMPROVEMENT OF THE CRITICAL CURRENT-DENSITY IN THE SILVER SHEATHED BI-PB-SR-CA-CU-O SUPERCONDUCTING TAPE [J].
MIMURA, M ;
KUMAKURA, H ;
TOGANO, K ;
MAEDA, H .
APPLIED PHYSICS LETTERS, 1989, 54 (16) :1582-1584
[6]   AG-SHEATHED TL-BA-CA-CU-O SUPERCONDUCTOR TAPE WITH TC=120-K [J].
OKADA, M ;
NISHIWAKI, R ;
KAMO, T ;
MATSUMOTO, T ;
AIHARA, K ;
MATSUDA, S ;
SEIDO, M .
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1988, 27 (12) :L2345-L2347
[7]   OBSERVATION OF ENHANCED PROPERTIES IN SAMPLES OF SILVER-OXIDE DOPED YBA2CU3OX [J].
PETERS, PN ;
SISK, RC ;
URBAN, EW ;
HUANG, CY ;
WU, MK .
APPLIED PHYSICS LETTERS, 1988, 52 (24) :2066-2067
[8]  
PRASAD R, 1989, MATER LETT, V7, P9
[9]   FABRICATION OF STABLE SUPERCONDUCTIVE WIRES WITH YBA2CU3OX/AG2O COMPOSITE CORE [J].
SEN, S ;
CHEN, IG ;
CHEN, CH ;
STEFANESCU, DM .
APPLIED PHYSICS LETTERS, 1989, 54 (08) :766-768
[10]   GRAIN-GROWTH ENHANCEMENT IN THE YBA2CU3O7-DELTA SUPERCONDUCTOR BY SILVER-OXIDE DOPING [J].
TIEFEL, TH ;
JIN, S ;
SHERWOOD, RC ;
DAVIS, ME ;
KAMMLOTT, GW ;
GALLAGHER, PK ;
JOHNSON, DW ;
FASTNACHT, RA ;
RHODES, WW .
MATERIALS LETTERS, 1989, 7 (11) :363-366