Angular scaling of critical current measurements on laser-ablated YBa2Cu3O7-δ thin films

G. Ravi Kumar, Michael Rudolf Koblischka, J. C. Martinez, R. Griessen, B. Dam, J. Rector

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Orientation dependent measurements of torque hysteresis loops on high quality laser-ablated YBa2Cu3O7-δ thin films were performed at a temperature of 30 K in magnetic fields up to 7 T. From these measurement we extract the field and orientation dependence of the in-plane critical current density Js(H,θ), where θ is the angle between the applied external magnetic field H and the plane of the film. Following the scaling arguments of Blatter, Geshkenbein and Larkin based on the anisotropic Ginzburg-Landau theory, we have been able to scale the measured Js(H, θ) into a form ∫(ε{lunate}(θ)H), where ε{lunate} (θ) = (sin2 θ + cos2 θ/gg2) 1 2 with γ = 3.4±0.3. The obtained value of the anisotropy parameter γ is much smaller than the values reported earlier for single crystals close to Tc.

Original languageEnglish
Pages (from-to)3053-3054
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Volume235-240
Issue numberPART 5
DOIs
Publication statusPublished - 1994 Jan 1
Externally publishedYes

Fingerprint

Critical currents
Electric current measurement
critical current
Magnetic fields
scaling
Thin films
Lasers
Hysteresis loops
thin films
magnetic fields
lasers
torque
Anisotropy
Torque
hysteresis
Single crystals
current density
anisotropy
single crystals
Temperature

ASJC Scopus subject areas

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

Cite this

Angular scaling of critical current measurements on laser-ablated YBa2Cu3O7-δ thin films. / Kumar, G. Ravi; Koblischka, Michael Rudolf; Martinez, J. C.; Griessen, R.; Dam, B.; Rector, J.

In: Physica C: Superconductivity and its Applications, Vol. 235-240, No. PART 5, 01.01.1994, p. 3053-3054.

Research output: Contribution to journalArticle

Kumar, G. Ravi ; Koblischka, Michael Rudolf ; Martinez, J. C. ; Griessen, R. ; Dam, B. ; Rector, J. / Angular scaling of critical current measurements on laser-ablated YBa2Cu3O7-δ thin films. In: Physica C: Superconductivity and its Applications. 1994 ; Vol. 235-240, No. PART 5. pp. 3053-3054.
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