Weak links and critical current density in Bi2Sr 2CaCu2Ox thin films

H. A. Lu; J. Chen; B. W. Wessels; D. L. Schulz; T. J. Marks

doi:10.1063/1.352875

Weak links and critical current density in Bi₂Sr ₂CaCu₂O_x thin films

H. A. Lu, J. Chen, B. W. Wessels, D. L. Schulz, T. J. Marks

Northwestern University

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

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Abstract

Magnetization measurements were performed on epitaxial and textured Bi ₂Sr₂CaCu₂O_x thin films deposited on (100) LaAlO₃ and MgO substrates. An anomalous dependence of the critical current density derived from magnetization hysteresis measurement on magnetic field is observed. The measured critical current density shows a minimum at a magnetic field (H_m) far below the upper critical field H_c2. The measured H_m in epitaxial films has an exponential dependence on temperature, e^-T/T₀ (T₀∼12.5 K). The anomalous field dependence of critical current density is attributed to the presence of weak links in the films.

Original language	English
Pages (from-to)	3886-3889
Number of pages	4
Journal	Journal of Applied Physics
Volume	73
Issue number	8
DOIs	https://doi.org/10.1063/1.352875
Publication status	Published - 1993

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Physics and Astronomy(all)

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title = "Weak links and critical current density in Bi2Sr 2CaCu2Ox thin films",

abstract = "Magnetization measurements were performed on epitaxial and textured Bi 2Sr2CaCu2Ox thin films deposited on (100) LaAlO3 and MgO substrates. An anomalous dependence of the critical current density derived from magnetization hysteresis measurement on magnetic field is observed. The measured critical current density shows a minimum at a magnetic field (Hm) far below the upper critical field Hc2. The measured Hm in epitaxial films has an exponential dependence on temperature, e-T/T0 (T0∼12.5 K). The anomalous field dependence of critical current density is attributed to the presence of weak links in the films.",

author = "Lu, {H. A.} and J. Chen and Wessels, {B. W.} and Schulz, {D. L.} and Marks, {T. J.}",

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AU - Lu, H. A.

AU - Chen, J.

AU - Wessels, B. W.

AU - Schulz, D. L.

AU - Marks, T. J.

PY - 1993

Y1 - 1993

N2 - Magnetization measurements were performed on epitaxial and textured Bi 2Sr2CaCu2Ox thin films deposited on (100) LaAlO3 and MgO substrates. An anomalous dependence of the critical current density derived from magnetization hysteresis measurement on magnetic field is observed. The measured critical current density shows a minimum at a magnetic field (Hm) far below the upper critical field Hc2. The measured Hm in epitaxial films has an exponential dependence on temperature, e-T/T0 (T0∼12.5 K). The anomalous field dependence of critical current density is attributed to the presence of weak links in the films.

AB - Magnetization measurements were performed on epitaxial and textured Bi 2Sr2CaCu2Ox thin films deposited on (100) LaAlO3 and MgO substrates. An anomalous dependence of the critical current density derived from magnetization hysteresis measurement on magnetic field is observed. The measured critical current density shows a minimum at a magnetic field (Hm) far below the upper critical field Hc2. The measured Hm in epitaxial films has an exponential dependence on temperature, e-T/T0 (T0∼12.5 K). The anomalous field dependence of critical current density is attributed to the presence of weak links in the films.

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Weak links and critical current density in Bi₂Sr ₂CaCu₂O_x thin films

Abstract

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