Granularity and intragrain penetration depth in RuSr2GdCu2O8

Y. Y. Xue, B. Lorenz, R. L. Meng, A. Baikalove, C. W. Chu

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

The multi-stage transition of RuSr2GdCu2O8 (Ru1212) ceramic samples was investigated. An intergrain phase-lock temperature of T2 is identified around 10-30 K. Slightly above T2, however, an isolated Ru1212 grain still behaves as a Josephson-junction array of superconductive nano-domains, which are phase-locked below an interdomain phase-lock temperature (intragrain transition-temperature) of T1 ≈ 33-40 K. The intragrain penetration depth λ1 was subsequently deduced from the ac susceptibility χ′ of powders with different particle-size d (0.3≤d≤10 μm in this work) between T1 and T2. The sample-dependent λ1 ≈ 2.5-6 μm so obtained is extremely long, and bears a systematic correlation with the T1 observed. A phase-separation model was proposed to interpret the data.

Original languageEnglish
Pages (from-to)251-253
Number of pages3
JournalPhysica C: Superconductivity and its applications
Volume364-365
DOIs
Publication statusPublished - 2001 Nov

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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