| 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 | en |
| ISSN | 0577-9073 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 是 |
| 國別 | TWN |
| 公開徵稿 | |
| 出版型式 | 紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/79932 ) |
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