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:Preparation, structure, and peritectic transition of RBa1.5Sr0.5Cu3Oy (R = La, Nd, Sm, Eu, Gd, Dy, Ho, and Y) superconductors
學年87
學期1
出版(發表)日期1998/08/01
作品名稱Preparation, structure, and peritectic transition of RBa1.5Sr0.5Cu3Oy (R = La, Nd, Sm, Eu, Gd, Dy, Ho, and Y) superconductors
作品名稱(其他語言)
著者Lin, M. Y.; Huang, J. T.; Kao, H.-C. I.; Wang, C. M.
單位淡江大學化學學系
出版者Kidlington: Pergamon
著錄名稱、卷期、頁數Materials Research Bulletin 33(8), pp.1241-1249
摘要A series of single-phase RBa1.5Sr0.5Cu3Oy (R = La, Nd, Sm, Eu, Gd, Dy, Ho, and Y) compounds with a triple-perovskite unit cell has been prepared by solid-state reaction method. Samples with a larger radius of the R ion (R = La and Nd) are tetragonal, whereas those with a smaller radius of the R ion (R = Sm, Eu, Gd, Dy, Ho, and Y) are orthorhombic. Unit-cell parameters of RBa1.5Sr0.5Cu3Oy decrease monotonically with a decrease of the radius of the R ion. A maximum at R = Nd, Sm, and Eu is found in the peritectic transition temperature (tp), the amount of oxygen loss (Δw) in this transition, and the enthalpy of fusion (ΔHf), respectively. An increase in the ΔHf is correlated with increasing tp for the respective orthorhombic and tetragonal phases of RBa1.5Sr0.5Cu3Oy compounds. Tc of the title compounds gradually increased from 52 to 86 K with a decrease in the radius of the R ion.
關鍵字oxides;superconductors;crystal structure;thermodynamic properties
語言英文
ISSN0025-5408
期刊性質國外
收錄於SCI
產學合作
通訊作者
審稿制度
國別英國
公開徵稿
出版型式紙本
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