Fabrication of thick YBa2Cu3O7-x films on optimized SrTiO3 buffered-MgO single crystals

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

doi:10.1109/TASC.2007.897422

Fabrication of thick YBa₂Cu₃O_7-x films on optimized SrTiO₃ buffered-MgO single crystals

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

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

3 Citations (Scopus)

Abstract

In this work, we studied the optimum deposition conditions for SrTiO ₃ (STO) buffers deposited on MgO single crystals substrates by PLD method. We found that 120 nm thick STO films, deposited at 730 °C, present the smoothest surface and a minimum FWMH of the (002) reflection. High quality, smooth and free-crack YBa₂Cu₃O_7-x (YBCO) thick superconducting films have then been fabricated using a deposition temperature of 800 °C on STO-buffered MgO substrates. A 373 nm thick YBCO/STO/MgO film can carry current densities J_c (77 K, 0 T) of 1.4 MA/cm² and J_c (77 K, 5 T) of 0.14 MA/cm². The J_c in high field overcomes the current transported in same experimental conditions by 180 nm thick YBCO film grown on Y₂O₃-decorated STO single crystal. For 1350 nm thick YBCO/STO/MgO film the J_c (77 K, 0 T) is about 0.8 MA/cm² and J_c (77 K, 5 T) is 0.09 MA/cm ².

Original language	English
Pages (from-to)	3713-3716
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	17
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2007.897422
Publication status	Published - 2007 Jun 1
Externally published	Yes

Keywords

Artificial pinning centers
Buffer layers
Critical current density
Thick films
YBaCuO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "Fabrication of thick YBa2Cu3O7-x films on optimized SrTiO3 buffered-MgO single crystals",

abstract = "In this work, we studied the optimum deposition conditions for SrTiO 3 (STO) buffers deposited on MgO single crystals substrates by PLD method. We found that 120 nm thick STO films, deposited at 730 °C, present the smoothest surface and a minimum FWMH of the (002) reflection. High quality, smooth and free-crack YBa2Cu3O7-x (YBCO) thick superconducting films have then been fabricated using a deposition temperature of 800 °C on STO-buffered MgO substrates. A 373 nm thick YBCO/STO/MgO film can carry current densities Jc (77 K, 0 T) of 1.4 MA/cm2 and Jc (77 K, 5 T) of 0.14 MA/cm2. The Jc in high field overcomes the current transported in same experimental conditions by 180 nm thick YBCO film grown on Y2O3-decorated STO single crystal. For 1350 nm thick YBCO/STO/MgO film the Jc (77 K, 0 T) is about 0.8 MA/cm2 and Jc (77 K, 5 T) is 0.09 MA/cm 2.",

keywords = "Artificial pinning centers, Buffer layers, Critical current density, Thick films, YBaCuO",

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

year = "2007",

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T1 - Fabrication of thick YBa2Cu3O7-x films on optimized SrTiO3 buffered-MgO single crystals

AU - Mele, P.

AU - Matsumoto, K.

AU - Horide, T.

AU - Ichinose, A.

AU - Mukaida, M.

AU - Yoshida, Y.

AU - Horii, S.

PY - 2007/6/1

Y1 - 2007/6/1

N2 - In this work, we studied the optimum deposition conditions for SrTiO 3 (STO) buffers deposited on MgO single crystals substrates by PLD method. We found that 120 nm thick STO films, deposited at 730 °C, present the smoothest surface and a minimum FWMH of the (002) reflection. High quality, smooth and free-crack YBa2Cu3O7-x (YBCO) thick superconducting films have then been fabricated using a deposition temperature of 800 °C on STO-buffered MgO substrates. A 373 nm thick YBCO/STO/MgO film can carry current densities Jc (77 K, 0 T) of 1.4 MA/cm2 and Jc (77 K, 5 T) of 0.14 MA/cm2. The Jc in high field overcomes the current transported in same experimental conditions by 180 nm thick YBCO film grown on Y2O3-decorated STO single crystal. For 1350 nm thick YBCO/STO/MgO film the Jc (77 K, 0 T) is about 0.8 MA/cm2 and Jc (77 K, 5 T) is 0.09 MA/cm 2.

AB - In this work, we studied the optimum deposition conditions for SrTiO 3 (STO) buffers deposited on MgO single crystals substrates by PLD method. We found that 120 nm thick STO films, deposited at 730 °C, present the smoothest surface and a minimum FWMH of the (002) reflection. High quality, smooth and free-crack YBa2Cu3O7-x (YBCO) thick superconducting films have then been fabricated using a deposition temperature of 800 °C on STO-buffered MgO substrates. A 373 nm thick YBCO/STO/MgO film can carry current densities Jc (77 K, 0 T) of 1.4 MA/cm2 and Jc (77 K, 5 T) of 0.14 MA/cm2. The Jc in high field overcomes the current transported in same experimental conditions by 180 nm thick YBCO film grown on Y2O3-decorated STO single crystal. For 1350 nm thick YBCO/STO/MgO film the Jc (77 K, 0 T) is about 0.8 MA/cm2 and Jc (77 K, 5 T) is 0.09 MA/cm 2.

KW - Artificial pinning centers

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KW - Critical current density

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KW - YBaCuO

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