Flux pinning properties of ErBa2Cu3Oy thin films with BaZrO3 nanorods

M. Haruta; T. Fujiyoshi; T. Sueyoshi; K. Dezaki; D. Ichigosaki; K. Miyahara; R. Miyagawa; M. Mukaida; K. Matsumoto; Y. Yoshida; A. Ichinose; S. Horii

doi:10.1088/0953-2048/19/8/019

Flux pinning properties of ErBa₂Cu₃O_y thin films with BaZrO₃ nanorods

M. Haruta, T. Fujiyoshi, T. Sueyoshi, K. Dezaki, D. Ichigosaki, K. Miyahara, R. Miyagawa, M. Mukaida, K. Matsumoto, Y. Yoshida, A. Ichinose, S. Horii

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30 Citations (Scopus)

Abstract

ErBa₂Cu₃O_y (ErBCO) thin films with BaZrO₃ (BZO) nanorods were prepared by a PLD method for an enhancement of the critical current density J_c. The values of J _c for the ErBCO thin film containing 1.5 wt% BZO (Er15) in magnetic fields are higher than those for the ErBCO thin film containing 0.5 wt% BZO (Er05). The peaks of J_c have been observed in the angular dependence of J_c in both the films when the magnetic field is applied parallel to the c-axis. It has been found that the peak is attributed to the flux pinning by BZO nanorods oriented parallel to the c-axis. The vortex glass-liquid transition temperature T_g and the pinning parameter m were derived by fitting observed electric transport properties to the theoretical expression based on the percolation transition model. The value of T_g of Er15 is higher than that of Er05. This result indicates that the vortex glass phase extends to a higher temperature region on increasing the fraction of BZO. The peak of m has been found in the magnetic field dependence. This fact is probably due to matching the density of BZO nanorods with that of fluxoids, which was confirmed by TEM observations.

Original language	English
Article number	019
Pages (from-to)	803-807
Number of pages	5
Journal	Superconductor Science and Technology
Volume	19
Issue number	8
DOIs	https://doi.org/10.1088/0953-2048/19/8/019
Publication status	Published - Aug 1 2006

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0953-2048/19/8/019

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title = "Flux pinning properties of ErBa2Cu3Oy thin films with BaZrO3 nanorods",

abstract = "ErBa2Cu3Oy (ErBCO) thin films with BaZrO3 (BZO) nanorods were prepared by a PLD method for an enhancement of the critical current density Jc. The values of J c for the ErBCO thin film containing 1.5 wt% BZO (Er15) in magnetic fields are higher than those for the ErBCO thin film containing 0.5 wt% BZO (Er05). The peaks of Jc have been observed in the angular dependence of Jc in both the films when the magnetic field is applied parallel to the c-axis. It has been found that the peak is attributed to the flux pinning by BZO nanorods oriented parallel to the c-axis. The vortex glass-liquid transition temperature Tg and the pinning parameter m were derived by fitting observed electric transport properties to the theoretical expression based on the percolation transition model. The value of Tg of Er15 is higher than that of Er05. This result indicates that the vortex glass phase extends to a higher temperature region on increasing the fraction of BZO. The peak of m has been found in the magnetic field dependence. This fact is probably due to matching the density of BZO nanorods with that of fluxoids, which was confirmed by TEM observations.",

author = "M. Haruta and T. Fujiyoshi and T. Sueyoshi and K. Dezaki and D. Ichigosaki and K. Miyahara and R. Miyagawa and M. Mukaida and K. Matsumoto and Y. Yoshida and A. Ichinose and S. Horii",

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T1 - Flux pinning properties of ErBa2Cu3Oy thin films with BaZrO3 nanorods

AU - Haruta, M.

AU - Fujiyoshi, T.

AU - Sueyoshi, T.

AU - Dezaki, K.

AU - Ichigosaki, D.

AU - Miyahara, K.

AU - Miyagawa, R.

AU - Mukaida, M.

AU - Matsumoto, K.

AU - Yoshida, Y.

AU - Ichinose, A.

AU - Horii, S.

PY - 2006/8/1

Y1 - 2006/8/1

N2 - ErBa2Cu3Oy (ErBCO) thin films with BaZrO3 (BZO) nanorods were prepared by a PLD method for an enhancement of the critical current density Jc. The values of J c for the ErBCO thin film containing 1.5 wt% BZO (Er15) in magnetic fields are higher than those for the ErBCO thin film containing 0.5 wt% BZO (Er05). The peaks of Jc have been observed in the angular dependence of Jc in both the films when the magnetic field is applied parallel to the c-axis. It has been found that the peak is attributed to the flux pinning by BZO nanorods oriented parallel to the c-axis. The vortex glass-liquid transition temperature Tg and the pinning parameter m were derived by fitting observed electric transport properties to the theoretical expression based on the percolation transition model. The value of Tg of Er15 is higher than that of Er05. This result indicates that the vortex glass phase extends to a higher temperature region on increasing the fraction of BZO. The peak of m has been found in the magnetic field dependence. This fact is probably due to matching the density of BZO nanorods with that of fluxoids, which was confirmed by TEM observations.

AB - ErBa2Cu3Oy (ErBCO) thin films with BaZrO3 (BZO) nanorods were prepared by a PLD method for an enhancement of the critical current density Jc. The values of J c for the ErBCO thin film containing 1.5 wt% BZO (Er15) in magnetic fields are higher than those for the ErBCO thin film containing 0.5 wt% BZO (Er05). The peaks of Jc have been observed in the angular dependence of Jc in both the films when the magnetic field is applied parallel to the c-axis. It has been found that the peak is attributed to the flux pinning by BZO nanorods oriented parallel to the c-axis. The vortex glass-liquid transition temperature Tg and the pinning parameter m were derived by fitting observed electric transport properties to the theoretical expression based on the percolation transition model. The value of Tg of Er15 is higher than that of Er05. This result indicates that the vortex glass phase extends to a higher temperature region on increasing the fraction of BZO. The peak of m has been found in the magnetic field dependence. This fact is probably due to matching the density of BZO nanorods with that of fluxoids, which was confirmed by TEM observations.

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Flux pinning properties of ErBa₂Cu₃O_y thin films with BaZrO₃ nanorods

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