Dependence of Thermal Activation Energy on Thickness and Magnetic Field in (Pr0.6Y0.4)Ba2Cu3O7/YBa2Cu3O7/(Pr0.6Y0.4)Ba2Cu3O7 Trilayers

C. Kwon; M. Damaske; Qi Li; L. Senapati; P. A. Warburton; T. Venkatesan

doi:10.1109/77.402815

Dependence of Thermal Activation Energy on Thickness and Magnetic Field in (Pr0.6Y0.4)Ba2Cu3O7/YBa2Cu3O7/(Pr0.6Y0.4)Ba2Cu3O7 Trilayers

C. Kwon, M. Damaske, Qi Li, L. Senapati, P. A. Warburton, T. Venkatesan

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We have studied the activation energy of thermally activated vortex motion using (Pr0.6Y0.4)Ba2Cu3O7/ YBa2Cu3O7/(Pr0.6Y0.4)Ba2Cu3O7 trilayer structures. The dependence of the activation energy on the thickness of the YBa2Cu3O7 layer and magnetic field was studied for YBa2Cu3O7 layer thicknesses of 1.2 ~ 120 nm and fields up to 7 T. We obtain a longitudinal vortex correlation length of 15 ~ 20 nm in YBa2Cu3O7. When the YBa2Cu3O7 layer is a few unit-cells thick, the activation energy shows a logarithmic field dependence. In the thickness range between 10 to 30 nm, the dependence of the activation energy on magnetic field shows a crossover behavior from logarithmic dependence at low fields to one of power law, Uo ~ H-α(with a - 0.5), at high fields. This crossover field does not depend on the thickness of the YBa2Cu3O7 layer.

Original language	English (US)
Pages (from-to)	1355-1358
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	5
Issue number	2
DOIs	https://doi.org/10.1109/77.402815
State	Published - Jun 1995

All Science Journal Classification (ASJC) codes

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

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title = "Dependence of Thermal Activation Energy on Thickness and Magnetic Field in (Pr0.6Y0.4)Ba2Cu3O7/YBa2Cu3O7/(Pr0.6Y0.4)Ba2Cu3O7 Trilayers",

abstract = "We have studied the activation energy of thermally activated vortex motion using (Pr0.6Y0.4)Ba2Cu3O7/ YBa2Cu3O7/(Pr0.6Y0.4)Ba2Cu3O7 trilayer structures. The dependence of the activation energy on the thickness of the YBa2Cu3O7 layer and magnetic field was studied for YBa2Cu3O7 layer thicknesses of 1.2 ~ 120 nm and fields up to 7 T. We obtain a longitudinal vortex correlation length of 15 ~ 20 nm in YBa2Cu3O7. When the YBa2Cu3O7 layer is a few unit-cells thick, the activation energy shows a logarithmic field dependence. In the thickness range between 10 to 30 nm, the dependence of the activation energy on magnetic field shows a crossover behavior from logarithmic dependence at low fields to one of power law, Uo ~ H-α(with a - 0.5), at high fields. This crossover field does not depend on the thickness of the YBa2Cu3O7 layer.",

author = "C. Kwon and M. Damaske and Qi Li and L. Senapati and Warburton, {P. A.} and T. Venkatesan",

year = "1995",

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language = "English (US)",

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journal = "IEEE Transactions on Applied Superconductivity",

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T1 - Dependence of Thermal Activation Energy on Thickness and Magnetic Field in (Pr0.6Y0.4)Ba2Cu3O7/YBa2Cu3O7/(Pr0.6Y0.4)Ba2Cu3O7 Trilayers

AU - Kwon, C.

AU - Damaske, M.

AU - Li, Qi

AU - Senapati, L.

AU - Warburton, P. A.

AU - Venkatesan, T.

PY - 1995/6

Y1 - 1995/6

N2 - We have studied the activation energy of thermally activated vortex motion using (Pr0.6Y0.4)Ba2Cu3O7/ YBa2Cu3O7/(Pr0.6Y0.4)Ba2Cu3O7 trilayer structures. The dependence of the activation energy on the thickness of the YBa2Cu3O7 layer and magnetic field was studied for YBa2Cu3O7 layer thicknesses of 1.2 ~ 120 nm and fields up to 7 T. We obtain a longitudinal vortex correlation length of 15 ~ 20 nm in YBa2Cu3O7. When the YBa2Cu3O7 layer is a few unit-cells thick, the activation energy shows a logarithmic field dependence. In the thickness range between 10 to 30 nm, the dependence of the activation energy on magnetic field shows a crossover behavior from logarithmic dependence at low fields to one of power law, Uo ~ H-α(with a - 0.5), at high fields. This crossover field does not depend on the thickness of the YBa2Cu3O7 layer.

AB - We have studied the activation energy of thermally activated vortex motion using (Pr0.6Y0.4)Ba2Cu3O7/ YBa2Cu3O7/(Pr0.6Y0.4)Ba2Cu3O7 trilayer structures. The dependence of the activation energy on the thickness of the YBa2Cu3O7 layer and magnetic field was studied for YBa2Cu3O7 layer thicknesses of 1.2 ~ 120 nm and fields up to 7 T. We obtain a longitudinal vortex correlation length of 15 ~ 20 nm in YBa2Cu3O7. When the YBa2Cu3O7 layer is a few unit-cells thick, the activation energy shows a logarithmic field dependence. In the thickness range between 10 to 30 nm, the dependence of the activation energy on magnetic field shows a crossover behavior from logarithmic dependence at low fields to one of power law, Uo ~ H-α(with a - 0.5), at high fields. This crossover field does not depend on the thickness of the YBa2Cu3O7 layer.

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Dependence of Thermal Activation Energy on Thickness and Magnetic Field in (Pr0.6Y0.4)Ba2Cu3O7/YBa2Cu3O7/(Pr0.6Y0.4)Ba2Cu3O7 Trilayers

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