Anomalous superconducting properties in the weak-ferromagnetic superconductors RuSr2GdCu2O8 and RuCa 2PrCu2O8

B. C. Chang; C. Y. Yang; Y. Y. Hsu; B. N. Lin; H. C. Ku

doi:10.1063/1.2354891

Anomalous superconducting properties in the weak-ferromagnetic superconductors RuSr₂GdCu₂O₈ and RuCa ₂PrCu₂O₈

B. C. Chang^*, C. Y. Yang, Y. Y. Hsu, B. N. Lin, H. C. Ku

^*此作品的通信作者

研究成果: 書貢獻/報告類型 › 會議論文篇章

3 引文斯高帕斯（Scopus）

摘要

Anomalous superconducting properties are reported through transport, magnetic, and x-ray absorption near-edge spectroscopy (XANES) studies on the weak-ferromagnetic superconductors RuSr₂GdCu₂O₈ and RuCa₂PrCu₂O₈. For RuSr ₂GdCu₂O₈ [T_m = 131 K, resistivity T_c(onset) = 56 K, T_c(zero) = T_c(dia) = 39 K], a spontaneous vortex state above T₀ = 30 K and a weak Meissner state below T₀ with a lower critical field B_c1(0) = 12 G is observed due to the weak dipole field (∼ 4 G) of the weak-ferromagnetic order. In RuCa₂PrCu₂O₈ (T_m = 47 K, possible T_c = 37 K), an anomalously large field-cooled diamagnetic shielding signal is observed below T_c. Both samples show mixed-valence Ru^4/5+ character from XANES data.

原文	英語
主出版物標題	LOW TEMPERATURE PHYSICS
主出版物子標題	24th International Conference on Low Temperature Physics - LT24
頁面	677-678
頁數	2
DOIs	https://doi.org/10.1063/1.2354891
出版狀態	已發佈 - 2006
對外發佈	是
事件	LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, 美国持續時間: 2006 8月 10 → 2006 10月 17

出版系列

名字	AIP Conference Proceedings
卷	850
ISSN（列印）	0094-243X
ISSN（電子）	1551-7616

其他

其他	LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
國家/地區	美国
城市	Orlando, FL
期間	2006/08/10 → 2006/10/17

ASJC Scopus subject areas

一般物理與天文學

存取文件

10.1063/1.2354891

其它文件與鏈接

Link to publication in Scopus

引用此

Chang, BC, Yang, CY, Hsu, YY, Lin, BN & Ku, HC 2006, Anomalous superconducting properties in the weak-ferromagnetic superconductors RuSr₂GdCu₂O₈ and RuCa ₂PrCu₂O₈. 於 LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. AIP Conference Proceedings, 卷 850, 頁 677-678, LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24, Orlando, FL, 美国, 2006/08/10. https://doi.org/10.1063/1.2354891

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title = "Anomalous superconducting properties in the weak-ferromagnetic superconductors RuSr2GdCu2O8 and RuCa 2PrCu2O8",

abstract = "Anomalous superconducting properties are reported through transport, magnetic, and x-ray absorption near-edge spectroscopy (XANES) studies on the weak-ferromagnetic superconductors RuSr2GdCu2O8 and RuCa2PrCu2O8. For RuSr 2GdCu2O8 [Tm = 131 K, resistivity Tc(onset) = 56 K, Tc(zero) = Tc(dia) = 39 K], a spontaneous vortex state above T0 = 30 K and a weak Meissner state below T0 with a lower critical field Bc1(0) = 12 G is observed due to the weak dipole field (∼ 4 G) of the weak-ferromagnetic order. In RuCa2PrCu2O8 (Tm = 47 K, possible Tc = 37 K), an anomalously large field-cooled diamagnetic shielding signal is observed below Tc. Both samples show mixed-valence Ru4/5+ character from XANES data.",

keywords = "High-Tc cuprates, Magnetic superconductor, Spontaneous vortex state",

author = "Chang, {B. C.} and Yang, {C. Y.} and Hsu, {Y. Y.} and Lin, {B. N.} and Ku, {H. C.}",

year = "2006",

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series = "AIP Conference Proceedings",

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AU - Chang, B. C.

AU - Yang, C. Y.

AU - Hsu, Y. Y.

AU - Lin, B. N.

AU - Ku, H. C.

PY - 2006

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N2 - Anomalous superconducting properties are reported through transport, magnetic, and x-ray absorption near-edge spectroscopy (XANES) studies on the weak-ferromagnetic superconductors RuSr2GdCu2O8 and RuCa2PrCu2O8. For RuSr 2GdCu2O8 [Tm = 131 K, resistivity Tc(onset) = 56 K, Tc(zero) = Tc(dia) = 39 K], a spontaneous vortex state above T0 = 30 K and a weak Meissner state below T0 with a lower critical field Bc1(0) = 12 G is observed due to the weak dipole field (∼ 4 G) of the weak-ferromagnetic order. In RuCa2PrCu2O8 (Tm = 47 K, possible Tc = 37 K), an anomalously large field-cooled diamagnetic shielding signal is observed below Tc. Both samples show mixed-valence Ru4/5+ character from XANES data.

AB - Anomalous superconducting properties are reported through transport, magnetic, and x-ray absorption near-edge spectroscopy (XANES) studies on the weak-ferromagnetic superconductors RuSr2GdCu2O8 and RuCa2PrCu2O8. For RuSr 2GdCu2O8 [Tm = 131 K, resistivity Tc(onset) = 56 K, Tc(zero) = Tc(dia) = 39 K], a spontaneous vortex state above T0 = 30 K and a weak Meissner state below T0 with a lower critical field Bc1(0) = 12 G is observed due to the weak dipole field (∼ 4 G) of the weak-ferromagnetic order. In RuCa2PrCu2O8 (Tm = 47 K, possible Tc = 37 K), an anomalously large field-cooled diamagnetic shielding signal is observed below Tc. Both samples show mixed-valence Ru4/5+ character from XANES data.

KW - High-Tc cuprates

KW - Magnetic superconductor

KW - Spontaneous vortex state

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