Superconducting fluctuation effects in grain-aligned HgBa2Ca2Cu3O8+δ

Myoung Kwang Bae, M. S. Choi, Sergey Lee, Sung Ik Lee, W. C. Lee

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We have measured the normal state magnetization for grain-aligned HgBa2Ca2Cu3O8+δ with high and low magnetic fields applied perpendicular to the CuO2 planes. The high-field magnetization curves follow the three-dimensional scaling based on the Ginzburg-Landau theory. In addition, we observed significant superconducting fluctuation diamagnetism above Tc using a low magnetic field, and analyzed it by utilizing the modified Lawrence-Doniach model. Our result demonstrates the dimensional crossover from 3D to 2D as the temperature increases, which is consistent with the scaling result of a high-field limit. From the analysis, we obtained the upper critical field slope, zero-temperature GL coherence length, and mass anisotropy.

Original languageEnglish
Pages (from-to)249-251
Number of pages3
JournalPhysica C: Superconductivity and its Applications
Volume231
Issue number3-4
DOIs
Publication statusPublished - 1994 Oct 1
Externally publishedYes

ASJC Scopus subject areas

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

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