教師資料查詢 | 類別: 期刊論文 | 教師: 王啟銘 WANG, CHI-MING (瀏覽個人網頁)

標題:Rietveld analysis on Gd(Ba2−xAx)Cu3Oy (A = Ca, Sr) superconductors
學年89
學期1
出版(發表)日期2000/11/01
作品名稱Rietveld analysis on Gd(Ba2−xAx)Cu3Oy (A = Ca, Sr) superconductors
作品名稱(其他語言)
著者Kao, H.-C. I.; Chin, C. H. ; Huang, R. C. ; Wang, C. M.
單位淡江大學化學學系
出版者Amsterdam: Elsevier BV * North-Holland
著錄名稱、卷期、頁數Physica C: Superconductivity and its Applications 341-348(PART 1), pp.623-624
摘要Two series of single phase triple-perovskite superconducting samples with nominal compositions of Gd(Ba2−xCax)Cu3Oy (Ca series, 0 ≤ x ≤ 0.30) and Gd(Ba2−xSrx)Cu3Oy (Sr series, 0 ≤ x′ ≤ 1.0) were prepared. Orthorhombicity decreases with increasing amount of Ca or Sr substitution. Part of Ca ions occupy R site and push the same amount of Gd3+ ion into Ba site, attracting negative oxygen ions to randomly occupy O(4) and O(5) sites on the basal plane which leads to a further reduction of orthorhombicity in Gd(Ba2−xCax)Cu3Oy series compared with the same amount of substitution in Sr series, in which, Sr only occupies the Ba site. Tc is dependent on the orthorhombicity of these samples, no matter wheater it is Ca or Sr substitution.
關鍵字Calcination;Calcium;Composition;Oxygen;Perovskite;Sintering;Solubility;Strontium;Substitution reactions;Superconducting transition temperature;Superconductivity;X ray diffraction analysis;Conventional solid state reaction;Orthorhombicity;Partial substitution;Rietveld analysis;Oxide superconductors
語言英文
ISSN0921-4534
期刊性質國外
收錄於SCI
產學合作
通訊作者
審稿制度
國別荷蘭
公開徵稿
出版型式紙本
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