Thermal transport in the oxygenated magnetic superconductor, Eu1.5Ce0.5RuSr2Cu2O10+δ

B. D. Hennings, K. D.D. Rathnayaka, D. G. Naugle*, I. Felner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The thermal conductivity and thermopower are reported for a hole doped Eu1.5Ce0.5RuSr2Cu2O10+δ sample that has been annealed at 1100 K under an oxygen pressure of 54 atm. At Tc = 45 K superconductivity and weak ferromagnetism coexist (Tm = 180 K). Weak features in the thermopower, S(T), and thermal conductivity, κ(T), are observed both at Tm and at T* = 140 K. The thermopower begins to decrease sharply toward zero at Tc, and there is an extremely sharp increase of about 30% in the thermal conductivity at Tc. This "first order" transition may be related to the sudden appearance of a spontaneous vortex phase at Tc. A small shoulder is observed in κ(T) in the temperature range T = 5-13 K.

Original languageEnglish
Pages (from-to)253-258
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume370
Issue number4
DOIs
StatePublished - May 2002

Keywords

  • Coexistence of superconductivity and magnetism
  • Magnetism
  • Ru-2122 compounds
  • Spontaneous vortex state
  • Transport properties

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