Dimensionality and irreversibility field in YBa2Cu3O7 films

Satoshi Awaji; Kazuo Watanabe; N. Kobayashi; Hisanori Yamane; T. Hirai

Dimensionality and irreversibility field in YBa₂Cu₃O₇ films

Satoshi Awaji, Kazuo Watanabe, N. Kobayashi, Hisanori Yamane, T. Hirai

High Field Laboratory for Superconducting Materials

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

Abstract

In order to investigate the relationship between the flux pinning and dimensionality, the critical current density J_c for YBa₂Cu₃O₇ films was measured as a function of temperature, field and tilt angle between field and c-axis. The kink anomaly in the temperature dependence of J_c for B⊥c was observed as the dimensional crossover from 3D extrinsic pinning to 2D intrinsic pinning. The irreversibility field B_i for B//c was measured in fields up to 23T and estimated to be 90T at 30K using the scaling law of the pinning force densities. The enhancement of B_i from a power law (1-T/T_c)ⁿ with n≃1.5 for B//c was observed below 40K. This suggests the formation of the 2-dimensional pancake vortex in YBa₂Cu₃O₇.

Original language	English
Pages (from-to)	333-337
Number of pages	5
Journal	Science Reports of the Rerearch Institutes Tohoku University Series A-Physics
Volume	42
Issue number	2
Publication status	Published - 1996 May 1

Keywords

Critical current density
Dimensional crossover
Intrinsic pinning
Irreversibility field
YBaCuO film

ASJC Scopus subject areas

Condensed Matter Physics
Metals and Alloys

Cite this

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abstract = "In order to investigate the relationship between the flux pinning and dimensionality, the critical current density Jc for YBa2Cu3O7 films was measured as a function of temperature, field and tilt angle between field and c-axis. The kink anomaly in the temperature dependence of Jc for B⊥c was observed as the dimensional crossover from 3D extrinsic pinning to 2D intrinsic pinning. The irreversibility field Bi for B//c was measured in fields up to 23T and estimated to be 90T at 30K using the scaling law of the pinning force densities. The enhancement of Bi from a power law (1-T/Tc)n with n≃1.5 for B//c was observed below 40K. This suggests the formation of the 2-dimensional pancake vortex in YBa2Cu3O7.",

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T1 - Dimensionality and irreversibility field in YBa2Cu3O7 films

AU - Awaji, Satoshi

AU - Watanabe, Kazuo

AU - Kobayashi, N.

AU - Yamane, Hisanori

AU - Hirai, T.

PY - 1996/5/1

Y1 - 1996/5/1

N2 - In order to investigate the relationship between the flux pinning and dimensionality, the critical current density Jc for YBa2Cu3O7 films was measured as a function of temperature, field and tilt angle between field and c-axis. The kink anomaly in the temperature dependence of Jc for B⊥c was observed as the dimensional crossover from 3D extrinsic pinning to 2D intrinsic pinning. The irreversibility field Bi for B//c was measured in fields up to 23T and estimated to be 90T at 30K using the scaling law of the pinning force densities. The enhancement of Bi from a power law (1-T/Tc)n with n≃1.5 for B//c was observed below 40K. This suggests the formation of the 2-dimensional pancake vortex in YBa2Cu3O7.

AB - In order to investigate the relationship between the flux pinning and dimensionality, the critical current density Jc for YBa2Cu3O7 films was measured as a function of temperature, field and tilt angle between field and c-axis. The kink anomaly in the temperature dependence of Jc for B⊥c was observed as the dimensional crossover from 3D extrinsic pinning to 2D intrinsic pinning. The irreversibility field Bi for B//c was measured in fields up to 23T and estimated to be 90T at 30K using the scaling law of the pinning force densities. The enhancement of Bi from a power law (1-T/Tc)n with n≃1.5 for B//c was observed below 40K. This suggests the formation of the 2-dimensional pancake vortex in YBa2Cu3O7.

KW - Critical current density

KW - Dimensional crossover

KW - Intrinsic pinning

KW - Irreversibility field

KW - YBaCuO film

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Dimensionality and irreversibility field in YBa₂Cu₃O₇ films

Abstract

Keywords

ASJC Scopus subject areas

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