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

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Citations (Scopus)

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 [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.

Original language	English
Title of host publication	LOW TEMPERATURE PHYSICS
Subtitle of host publication	24th International Conference on Low Temperature Physics - LT24
Pages	677-678
Number of pages	2
DOIs	https://doi.org/10.1063/1.2354891
Publication status	Published - 2006
Externally published	Yes
Event	LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States Duration: 2006 Aug 10 → 2006 Oct 17

Publication series

Name	AIP Conference Proceedings
Volume	850
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Country/Territory	United States
City	Orlando, FL
Period	2006/08/10 → 2006/10/17

Keywords

High-Tc cuprates
Magnetic superconductor
Spontaneous vortex state

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1063/1.2354891

Cite this

Anomalous superconducting properties in the weak-ferromagnetic superconductors RuSr₂GdCu₂O₈ and RuCa ₂PrCu₂O₈. / Chang, B. C.; Yang, C. Y.; Hsu, Y. Y. et al.
LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. 2006. p. 677-678 (AIP Conference Proceedings; Vol. 850).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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

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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.}",

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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.

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