Anisotropy of upper critical field in the (110)t and (001)t planes for single-crystal La1.86Sr0.14CuO4

Tetsuo Hanaguri, Tetsuo Fukase, Yoji Koike, Isao Tanaka, Hironao Kojima

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Anisotropy of the upper critical field HC2 has been investigated in detail for single-crystal La1.86Sr0.14CuO4 grown by the TSFZ method. When magnetic fields are applied in the (110)t plane, large anisotropy of Hc2, Hc2/Hc2 ≳ 10, is observed and the angular dependence is well expressed by the effective mass model suitable for anisotropic 3-dimensional superconductors. When magnetic fields are applied in the (001)t plane, namely in the CuO2 plane, small but clear anisotropy of Hc2 with 4-fold symmetry is found. This is not attributed to the anisotropy of Hc2 or the critical current due to the twin structure in the orthorhombic phase, but seems due to the anisotropy originating in the electronic state in the CuO2 plane.

Original languageEnglish
Pages (from-to)1449-1450
Number of pages2
JournalPhysica B: Condensed Matter
Volume165-166
DOIs
Publication statusPublished - 1990 Jan 1

ASJC Scopus subject areas

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

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