Anisotropy parameter for Bi2Sr2CaCu2O8+δ single crystal by magnetic torque measurements in high magnetic fields

Shuichi Kawamata, Kazuo Inoue, Kiichi Okuda, Takahiko Sasaki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The applied field dependence of the anisotropy parameter, γ, defined by the square root of the effective mass ratio for the layered superconductor Bi2Sr2CaCu2O8+δ single crystal has been obtained by the magnetic torque measurements in several static magnetic fields up to 210kOe at 52 and 69 K. Although γ has a huge value of larger than 200 for fields below 20kOe, it becomes less than 60 in 210kOe. It is considered that the huge γ in lower field is affected by the layered structure effect like the intrinsic pinning in addition to the irreversibility due to the flux pinning. The relatively small δ value in higher field reveals the actual effective mass anisotropy.

Original languageEnglish
Pages (from-to)437-440
Number of pages4
JournalPhysica B: Condensed Matter
Volume246-247
Publication statusPublished - 1998 May 29
Externally publishedYes

Fingerprint

Torque measurement
Magnetic variables measurement
torque
Anisotropy
Single crystals
Magnetic fields
Flux pinning
anisotropy
flux pinning
single crystals
magnetic fields
mass ratios
Superconducting materials

Keywords

  • Anisotropy in superconducting vortex state
  • Bi-based high temperature superconductors
  • Magnetic torque measurements

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Anisotropy parameter for Bi2Sr2CaCu2O8+δ single crystal by magnetic torque measurements in high magnetic fields. / Kawamata, Shuichi; Inoue, Kazuo; Okuda, Kiichi; Sasaki, Takahiko.

In: Physica B: Condensed Matter, Vol. 246-247, 29.05.1998, p. 437-440.

Research output: Contribution to journalArticle

Kawamata, Shuichi ; Inoue, Kazuo ; Okuda, Kiichi ; Sasaki, Takahiko. / Anisotropy parameter for Bi2Sr2CaCu2O8+δ single crystal by magnetic torque measurements in high magnetic fields. In: Physica B: Condensed Matter. 1998 ; Vol. 246-247. pp. 437-440.
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