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

研究成果: Article

8 引用 (Scopus)

抄録

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.

元の言語English
ページ(範囲)3053-3054
ページ数2
ジャーナルPhysica C: Superconductivity and its Applications
235-240
発行部数PART 5
DOI
出版物ステータスPublished - 1994 1 1
外部発表Yes

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

これを引用

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.

:: Physica C: Superconductivity and its Applications, 巻 235-240, 番号 PART 5, 01.01.1994, p. 3053-3054.

研究成果: Article

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. :: Physica C: Superconductivity and its Applications. 1994 ; 巻 235-240, 番号 PART 5. pp. 3053-3054.
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AU - Koblischka, Michael Rudolf

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AU - Dam, B.

AU - Rector, J.

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N2 - 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.

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