標題: EFFECT OF AG2O ADDITIVE ON MICROSTRUCTURE AND SUPERCONDUCTIVITY OF THE TL2BA2CA2CU3OY COMPOUND
作者: KOO, HS
HURNG, WM
LEE, WH
TSENG, TY
CHEN, M
LO, JR
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 21-Jun-1993
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.
URI: http://dx.doi.org/10.1063/1.109069
http://hdl.handle.net/11536/2978
ISSN: 0003-6951
DOI: 10.1063/1.109069
期刊: APPLIED PHYSICS LETTERS
Volume: 62
Issue: 25
起始頁: 3354
結束頁: 3356
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