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

B. C. Chang, C. Y. Yang, Yung-Yuan Hsu, B. N. Lin, H. C. Ku

Research output: Chapter in Book/Report/Conference proceedingConference 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 [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.

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages677-678
Number of pages2
Volume850
DOIs
Publication statusPublished - 2006 Dec 1
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 2006 Aug 102006 Oct 17

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
CountryUnited States
CityOrlando, FL
Period06/8/1006/10/17

Fingerprint

x ray absorption
spectroscopy
shielding
vortices
dipoles
valence
electrical resistivity

Keywords

  • High-Tc cuprates
  • Magnetic superconductor
  • Spontaneous vortex state

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Chang, B. C., Yang, C. Y., Hsu, Y-Y., Lin, B. N., & Ku, H. C. (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 (Vol. 850, pp. 677-678) https://doi.org/10.1063/1.2354891

Anomalous superconducting properties in the weak-ferromagnetic superconductors RuSr2GdCu2O8 and RuCa 2PrCu2O8. / Chang, B. C.; Yang, C. Y.; Hsu, Yung-Yuan; Lin, B. N.; Ku, H. C.

LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. Vol. 850 2006. p. 677-678.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Chang, BC, Yang, CY, Hsu, Y-Y, 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. vol. 850, pp. 677-678, LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24, Orlando, FL, United States, 06/8/10. https://doi.org/10.1063/1.2354891
Chang BC, Yang CY, Hsu Y-Y, Lin BN, Ku HC. Anomalous superconducting properties in the weak-ferromagnetic superconductors RuSr2GdCu2O8 and RuCa 2PrCu2O8. In LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. Vol. 850. 2006. p. 677-678 https://doi.org/10.1063/1.2354891
Chang, B. C. ; Yang, C. Y. ; Hsu, Yung-Yuan ; Lin, B. N. ; Ku, H. C. / Anomalous superconducting properties in the weak-ferromagnetic superconductors RuSr2GdCu2O8 and RuCa 2PrCu2O8. LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. Vol. 850 2006. pp. 677-678
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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.

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