High critical current density in high field in Sm1+xBa 2-xCu3O6+y thin films

Yutaka Yoshida; Yusuke Ichino; Masashi Miura; Yoshiaki Takai; Kaname Matsumoto; Ataru Ichinose; Shigeru Horii; Masashi Mukaida

doi:10.1109/TASC.2005.847798

High critical current density in high field in Sm_1+xBa _2-xCu₃O_6+y thin films

Yutaka Yoshida, Yusuke Ichino, Masashi Miura, Yoshiaki Takai, Kaname Matsumoto, Ataru Ichinose, Shigeru Horii, Masashi Mukaida

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

35 Citations (Scopus)

Abstract

Critical current density (J_c), irreversibility field (B _irr) and microstructure in epitaxial SmBa₂Cu ₃O_7-x (SmBCO) films are reported. We have developed a novel approach to deposit high performance Sm_1+xBa _2-xCu₃O_6+y (Sm-123) at relatively low substrate temperature on MgO. The use of thin SmBCO seed layer grown at a high substrate temperature enabled us to obtain fully c-axis oriented SmBCO films with high critical current density (J_c) of 2.8 × 10⁵ A/cm ² under 5 T for B//C at 77 K. This value is as high as in the optimized NbTi superconducting wires achieved for 5 T at 4.2 K. Compared with YBa₂Cu₃O_7-y films, Sm-123 films showed higher J_c in high fields at 77 K. Transmission electron microscopy TEM analyses clarified the Sm/Ba composition ratio fluctuations in the Sm-123 matrix composition in the range of x = 0 - 0.14 with a wavelength of 50-100 nm.

Original language	English
Pages (from-to)	2727-2730
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	15
Issue number	2 PART III
DOIs	https://doi.org/10.1109/TASC.2005.847798
Publication status	Published - Jun 2005

All Science Journal Classification (ASJC) codes

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

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10.1109/TASC.2005.847798

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title = "High critical current density in high field in Sm1+xBa 2-xCu3O6+y thin films",

abstract = "Critical current density (Jc), irreversibility field (B irr) and microstructure in epitaxial SmBa2Cu 3O7-x (SmBCO) films are reported. We have developed a novel approach to deposit high performance Sm1+xBa 2-xCu3O6+y (Sm-123) at relatively low substrate temperature on MgO. The use of thin SmBCO seed layer grown at a high substrate temperature enabled us to obtain fully c-axis oriented SmBCO films with high critical current density (Jc) of 2.8 × 105 A/cm 2 under 5 T for B//C at 77 K. This value is as high as in the optimized NbTi superconducting wires achieved for 5 T at 4.2 K. Compared with YBa2Cu3O7-y films, Sm-123 films showed higher Jc in high fields at 77 K. Transmission electron microscopy TEM analyses clarified the Sm/Ba composition ratio fluctuations in the Sm-123 matrix composition in the range of x = 0 - 0.14 with a wavelength of 50-100 nm.",

author = "Yutaka Yoshida and Yusuke Ichino and Masashi Miura and Yoshiaki Takai and Kaname Matsumoto and Ataru Ichinose and Shigeru Horii and Masashi Mukaida",

year = "2005",

month = jun,

doi = "10.1109/TASC.2005.847798",

language = "English",

volume = "15",

pages = "2727--2730",

journal = "IEEE Transactions on Applied Superconductivity",

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T1 - High critical current density in high field in Sm1+xBa 2-xCu3O6+y thin films

AU - Yoshida, Yutaka

AU - Ichino, Yusuke

AU - Miura, Masashi

AU - Takai, Yoshiaki

AU - Matsumoto, Kaname

AU - Ichinose, Ataru

AU - Horii, Shigeru

AU - Mukaida, Masashi

PY - 2005/6

Y1 - 2005/6

N2 - Critical current density (Jc), irreversibility field (B irr) and microstructure in epitaxial SmBa2Cu 3O7-x (SmBCO) films are reported. We have developed a novel approach to deposit high performance Sm1+xBa 2-xCu3O6+y (Sm-123) at relatively low substrate temperature on MgO. The use of thin SmBCO seed layer grown at a high substrate temperature enabled us to obtain fully c-axis oriented SmBCO films with high critical current density (Jc) of 2.8 × 105 A/cm 2 under 5 T for B//C at 77 K. This value is as high as in the optimized NbTi superconducting wires achieved for 5 T at 4.2 K. Compared with YBa2Cu3O7-y films, Sm-123 films showed higher Jc in high fields at 77 K. Transmission electron microscopy TEM analyses clarified the Sm/Ba composition ratio fluctuations in the Sm-123 matrix composition in the range of x = 0 - 0.14 with a wavelength of 50-100 nm.

AB - Critical current density (Jc), irreversibility field (B irr) and microstructure in epitaxial SmBa2Cu 3O7-x (SmBCO) films are reported. We have developed a novel approach to deposit high performance Sm1+xBa 2-xCu3O6+y (Sm-123) at relatively low substrate temperature on MgO. The use of thin SmBCO seed layer grown at a high substrate temperature enabled us to obtain fully c-axis oriented SmBCO films with high critical current density (Jc) of 2.8 × 105 A/cm 2 under 5 T for B//C at 77 K. This value is as high as in the optimized NbTi superconducting wires achieved for 5 T at 4.2 K. Compared with YBa2Cu3O7-y films, Sm-123 films showed higher Jc in high fields at 77 K. Transmission electron microscopy TEM analyses clarified the Sm/Ba composition ratio fluctuations in the Sm-123 matrix composition in the range of x = 0 - 0.14 with a wavelength of 50-100 nm.

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High critical current density in high field in Sm_1+xBa _2-xCu₃O_6+y thin films

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