期刊論文
| 學年 | 90 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2001-11-01 |
| 作品名稱 | Superconductivity and magnetism in Sr2Y(Ru1-uCuu)O6 and in Ba2Gd(Ru1-uCuu)O6 |
| 作品名稱（其他語言） | |
| 著者 | Harshman, D. R.; Kossler, W. J.; Greer, A. J.; Stronach, C. E.; Noakes, D. R.; Koster, E.; Wu, M. K.; Chien, F. Z.; Blackstead, H. A.; Pulling, D. B.; Dow, John D. |
| 單位 | 淡江大學物理學系 |
| 出版者 | Amsterdam: Elsevier BV * North-Holland |
| 著錄名稱、卷期、頁數 | Physica C: Superconductivity and its Applications 364-365, pp.392-398 |
| 摘要 | Muon spin rotation and electron spin resonance data on sintered samples of superconducting Sr2Y(Ru1−uCuu)O6 and non-superconducting Ba2Gd(Ru1−uCuu)O6 are reported, both for u=0.1. In the case of Sr2Y(Ru1−uCuu)O6, the SrO layers are found to be p-type and to exhibit an onset for superconductivity at ≈45 K – a temperature considerably lower than the spin-ordering temperature of the Cu ions (≈86 K), indicating that the Cu ions themselves do not play a significant role in the superconductivity. Below Tc, the fluctuating Ru moments begin to slow down and freeze, so that at about ≈29.3 K a spin-glass state is observed, which gives way to ferromagnetic ordering of the Ru ions in the Y(Ru1−uCuu)O4 planes, with the magnetization alternating direction in the a–b plane from one magnetic layer to the next. These data confirm our earlier discovery that fluctuating moments (in this case, Ru moments) interfere with pairing. Ba2Gd(Ru1−uCuu)O6 shows no evidence of superconductivity, which we interpret as due to pair breaking by the L=0 magnetic Gd ions, which are not crystal-field split. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 0921-4534 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | |
| 國別 | NLD |
| 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/987654321/27733 ) |