教師資料查詢 | 類別: 期刊論文 | 教師: 林大欽 LING, DAH-CHIN (瀏覽個人網頁)

標題:Physical Properties of the Weak-Ferromagnetic Superconductor RuSr2EuCu2O8
學年98
學期1
出版(發表)日期2009/08/01
作品名稱Physical Properties of the Weak-Ferromagnetic Superconductor RuSr2EuCu2O8
作品名稱(其他語言)
著者Chang, B. C.; Yang, C. Y.; Ku, H. C.; Ho, J. C.; Tsai, C. B.; Chen, Y. Y.; Ling, D. C.
單位淡江大學物理學系
出版者臺北市中華民國物理學會
著錄名稱、卷期、頁數Chinese Journal of Physics=中華民國物理學刊 47(4), pp.529-539
摘要Similar to the optimal-doped, weak-ferromagnetic (WFM induced by canted antiferromagnetism, T(subscript Curie)=131K) and superconducting (T(subscript c)=56K) RuSr2GdCu2O8, underdoped RuSr2EuCu2O8 (T(subscript Curie)=133K, T(subscript c)=36K) also exhibited a spontaneous vortex state (SVS) between 16K and 36K. The low field (±20G) superconducting hysteresis loop indicates a weak and narrow Meissner state region of average lower critical field B(superscript ave subscript cl) (T)=B(superscript ave subscript cl) (0)[1-(T/T(subscript SVS))^2], with B(superscript ave subscript cl) (0)=7G and T(subscript SVS)=16K. The vortex melting transition (T(subscript melting)=21K) below T(subscript c), obtained from the broad resistivity drop and the onset of the diamagnetic signal, indicates a vortex liquid region due to the coexistence and interplay between superconductivity and the WFM order. No visible jump in specific heat was observed near T(subscript c) for Eu-and Gd-compounds. Finally, with the baseline from the nonmagnetic Eu-compound, the specific heat data analysis confirms the magnetic entropy associated with antiferromagnetic ordering of Gd^3+(J=S=7/2) at 2.5K to be close to N(subscript A)k ln 8, as expected.
關鍵字
語言英文
ISSN0577-9073
期刊性質國外
收錄於SCI
產學合作
通訊作者
審稿制度
國別中華民國
公開徵稿
出版型式紙本
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