Critical current enhancement in PLD YBa2Cu3O7-x films using artificial pinning centers

P. Mele; K. Matsumoto; T. Horide; O. Miura; A. Ichinose; M. Mukaida; Y. Yoshida; S. Horii

doi:10.1016/j.physc.2006.04.064

Critical current enhancement in PLD YBa₂Cu₃O_7-x films using artificial pinning centers

P. Mele, K. Matsumoto, T. Horide, O. Miura, A. Ichinose, M. Mukaida, Y. Yoshida, S. Horii

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

16 Citations (Scopus)

Abstract

We introduced high-density columnar defects as artificial pinning centers (APCs) for quantized vortices into YBa₂Cu₃O_7-x (YBCO) films during the film deposition procedure. APCs were introduced perpendicular to the film surface using nano-sized Y₂O₃ islands prepared on SrTiO₃(1 0 0) substrates. Varying the deposition parameters and the substrate annealing conditions allowed strong changes in the shape and density of the Y₂O₃ islands to be induced. Compared to a pure YBCO film, the best performance among the APCs samples was obtained on the Y₂O₃-deposited substrate with 5 laser pulses, corresponding to a nominal thickness of 0.2 nm. Even when the APC films were prepared using the same deposition conditions, the columnar defects enhanced J_c at 77 K from 1.8 to 2.7 MA/cm² (self field) and from 0.06 to 0.10 MA/cm² (H = 5 T, H∥c-axis).

Original language	English
Pages (from-to)	648-651
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	445-448
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physc.2006.04.064
Publication status	Published - Oct 1 2006

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "Critical current enhancement in PLD YBa2Cu3O7-x films using artificial pinning centers",

abstract = "We introduced high-density columnar defects as artificial pinning centers (APCs) for quantized vortices into YBa2Cu3O7-x (YBCO) films during the film deposition procedure. APCs were introduced perpendicular to the film surface using nano-sized Y2O3 islands prepared on SrTiO3(1 0 0) substrates. Varying the deposition parameters and the substrate annealing conditions allowed strong changes in the shape and density of the Y2O3 islands to be induced. Compared to a pure YBCO film, the best performance among the APCs samples was obtained on the Y2O3-deposited substrate with 5 laser pulses, corresponding to a nominal thickness of 0.2 nm. Even when the APC films were prepared using the same deposition conditions, the columnar defects enhanced Jc at 77 K from 1.8 to 2.7 MA/cm2 (self field) and from 0.06 to 0.10 MA/cm2 (H = 5 T, H∥c-axis).",

author = "P. Mele and K. Matsumoto and T. Horide and O. Miura and A. Ichinose and M. Mukaida and Y. Yoshida and S. Horii",

year = "2006",

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doi = "10.1016/j.physc.2006.04.064",

language = "English",

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T1 - Critical current enhancement in PLD YBa2Cu3O7-x films using artificial pinning centers

AU - Mele, P.

AU - Matsumoto, K.

AU - Horide, T.

AU - Miura, O.

AU - Ichinose, A.

AU - Mukaida, M.

AU - Yoshida, Y.

AU - Horii, S.

PY - 2006/10/1

Y1 - 2006/10/1

N2 - We introduced high-density columnar defects as artificial pinning centers (APCs) for quantized vortices into YBa2Cu3O7-x (YBCO) films during the film deposition procedure. APCs were introduced perpendicular to the film surface using nano-sized Y2O3 islands prepared on SrTiO3(1 0 0) substrates. Varying the deposition parameters and the substrate annealing conditions allowed strong changes in the shape and density of the Y2O3 islands to be induced. Compared to a pure YBCO film, the best performance among the APCs samples was obtained on the Y2O3-deposited substrate with 5 laser pulses, corresponding to a nominal thickness of 0.2 nm. Even when the APC films were prepared using the same deposition conditions, the columnar defects enhanced Jc at 77 K from 1.8 to 2.7 MA/cm2 (self field) and from 0.06 to 0.10 MA/cm2 (H = 5 T, H∥c-axis).

AB - We introduced high-density columnar defects as artificial pinning centers (APCs) for quantized vortices into YBa2Cu3O7-x (YBCO) films during the film deposition procedure. APCs were introduced perpendicular to the film surface using nano-sized Y2O3 islands prepared on SrTiO3(1 0 0) substrates. Varying the deposition parameters and the substrate annealing conditions allowed strong changes in the shape and density of the Y2O3 islands to be induced. Compared to a pure YBCO film, the best performance among the APCs samples was obtained on the Y2O3-deposited substrate with 5 laser pulses, corresponding to a nominal thickness of 0.2 nm. Even when the APC films were prepared using the same deposition conditions, the columnar defects enhanced Jc at 77 K from 1.8 to 2.7 MA/cm2 (self field) and from 0.06 to 0.10 MA/cm2 (H = 5 T, H∥c-axis).

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JO - Physica C: Superconductivity and its applications

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ER -

Critical current enhancement in PLD YBa₂Cu₃O_7-x films using artificial pinning centers

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