Critical current properties at low angle grain boundaries in ErBa2Cu3Oy films

S. Horii; T. Horide; K. Matsumoto; T. Ozaki; Y. Ichino; Masashi Mukaida; Y. Yoshida; A. Ichinose; J. Shimoyama; K. Kishio

doi:10.1016/j.physc.2008.05.172

Critical current properties at low angle grain boundaries in ErBa2Cu3Oy films

S. Horii, T. Horide, K. Matsumoto, T. Ozaki, Y. Ichino, Masashi Mukaida, Y. Yoshida, A. Ichinose, J. Shimoyama, K. Kishio

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

Abstract

We report superconducting properties at a low angle grain boundary (GB) with a tilt angle of 5° for ErBa₂Cu₃O_y (Er123) films with various oxygen contents (y) and impurity-doping levels of strontium (Sr). A drastic change in critical temperatures was not observed between the films with and without a minute doping of Sr. However, the magnetic field dependence of critical current density (J_c) at GB and current density-voltage curves at GB for the Sr-doped Er123 film with a slightly carrier-overdoped state revealed that the effects of a minute Sr-doping showed good similarity to a case of the heavy Ca-doping into Y123 films. This probably means that electronic and/or crystallographic structures at GB of Er123 bicrystals were drastically changed by the Sr-doping.

Original language	English
Pages (from-to)	1670-1673
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	468
Issue number	15-20
DOIs	https://doi.org/10.1016/j.physc.2008.05.172
Publication status	Published - Sept 15 2008

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1016/j.physc.2008.05.172

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title = "Critical current properties at low angle grain boundaries in ErBa2Cu3Oy films",

abstract = "We report superconducting properties at a low angle grain boundary (GB) with a tilt angle of 5° for ErBa2Cu3Oy (Er123) films with various oxygen contents (y) and impurity-doping levels of strontium (Sr). A drastic change in critical temperatures was not observed between the films with and without a minute doping of Sr. However, the magnetic field dependence of critical current density (Jc) at GB and current density-voltage curves at GB for the Sr-doped Er123 film with a slightly carrier-overdoped state revealed that the effects of a minute Sr-doping showed good similarity to a case of the heavy Ca-doping into Y123 films. This probably means that electronic and/or crystallographic structures at GB of Er123 bicrystals were drastically changed by the Sr-doping.",

author = "S. Horii and T. Horide and K. Matsumoto and T. Ozaki and Y. Ichino and Masashi Mukaida and Y. Yoshida and A. Ichinose and J. Shimoyama and K. Kishio",

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doi = "10.1016/j.physc.2008.05.172",

language = "English",

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T1 - Critical current properties at low angle grain boundaries in ErBa2Cu3Oy films

AU - Horii, S.

AU - Horide, T.

AU - Matsumoto, K.

AU - Ozaki, T.

AU - Ichino, Y.

AU - Mukaida, Masashi

AU - Yoshida, Y.

AU - Ichinose, A.

AU - Shimoyama, J.

AU - Kishio, K.

PY - 2008/9/15

Y1 - 2008/9/15

N2 - We report superconducting properties at a low angle grain boundary (GB) with a tilt angle of 5° for ErBa2Cu3Oy (Er123) films with various oxygen contents (y) and impurity-doping levels of strontium (Sr). A drastic change in critical temperatures was not observed between the films with and without a minute doping of Sr. However, the magnetic field dependence of critical current density (Jc) at GB and current density-voltage curves at GB for the Sr-doped Er123 film with a slightly carrier-overdoped state revealed that the effects of a minute Sr-doping showed good similarity to a case of the heavy Ca-doping into Y123 films. This probably means that electronic and/or crystallographic structures at GB of Er123 bicrystals were drastically changed by the Sr-doping.

AB - We report superconducting properties at a low angle grain boundary (GB) with a tilt angle of 5° for ErBa2Cu3Oy (Er123) films with various oxygen contents (y) and impurity-doping levels of strontium (Sr). A drastic change in critical temperatures was not observed between the films with and without a minute doping of Sr. However, the magnetic field dependence of critical current density (Jc) at GB and current density-voltage curves at GB for the Sr-doped Er123 film with a slightly carrier-overdoped state revealed that the effects of a minute Sr-doping showed good similarity to a case of the heavy Ca-doping into Y123 films. This probably means that electronic and/or crystallographic structures at GB of Er123 bicrystals were drastically changed by the Sr-doping.

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JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 15-20

ER -

Critical current properties at low angle grain boundaries in ErBa2Cu3Oy films

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