Anomalous Zn- and Ni-substitution effects on superconductivity in the superconducting weak ferromagnets RuSr2RCu2O8 (R = Gd, Eu) | |
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學年 | 99 |
學期 | 1 |
出版(發表)日期 | 2010-12-01 |
作品名稱 | Anomalous Zn- and Ni-substitution effects on superconductivity in the superconducting weak ferromagnets RuSr2RCu2O8 (R = Gd, Eu) |
作品名稱(其他語言) | |
著者 | Ling, D.C.; Wu, S.L.; Lin, M.H.; Chien, F.Z. |
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 470(1), pp.S99–S100 |
摘要 | The effect of magnetic Ni and non-magnetic Zn impurities on superconducting transition temperature Tc in RuSr2R(Cu1−x(Ni, Zn)x)2O8 with R = Gd or Eu (Ni- and Zn-substituted Ru1212Gd(Eu)) was extensively studied. It is found that the suppression rate dTc/dx of RuSr2R(Cu1−x(Ni, Zn)x)2O8 is comparable to that of underdoped YBa2(Cu1−x(Ni, Zn)x)3O7−δ. The suppression of superconductivity in Ni-substituted Ru1212Eu samples is more significant than that in Zn-substituted ones, indicative of Ni being a more effective pair-breaker than Zn. In strong contrast, the magnetic Ni impurity atoms have a weaker effect on superconductivity than non-magnetic Zn atoms in Ru1212Gd, similar to what was observed in the high-Tc cuprates. These intriguing findings strongly suggest that the impurity-induced local disturbance of the 3d-spin correlation at Cu sites around Ni/Zn is distinctly different between Ru1212Gd and Ru1212Eu. |
關鍵字 | Impurity-induced Tc suppression; Ruthenocuprate; Superconducting weak ferromagnet |
語言 | en |
ISSN | 0921-4534 |
期刊性質 | 國外 |
收錄於 | SCI |
產學合作 | |
通訊作者 | Ling, D.C. |
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/987654321/77252 ) |