High critical current densities in ultrathin YBa2Cu 3O7-δ films sandwiched between (PrxY 1-x)Ba2Cu3O7-δ layers

C. Kwon; Qi Li; X. X. Xi; S. Bhattacharya; C. Doughty; T. Venkatesan; H. Zhang; J. W. Lynn; J. L. Peng; Z. Y. Li; N. D. Spencer; K. Feldman

doi:10.1063/1.108710

High critical current densities in ultrathin YBa₂Cu ₃O_7-δ films sandwiched between (Pr_xY _1-x)Ba₂Cu₃O_7-δ layers

C. Kwon, Qi Li, X. X. Xi, S. Bhattacharya, C. Doughty, T. Venkatesan, H. Zhang, J. W. Lynn, J. L. Peng, Z. Y. Li, N. D. Spencer, K. Feldman

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Abstract

YBa₂Cu₃O_7-δ (YBCO) films with nominal thicknesses of 1-4 unit cells were grown by pulsed laser deposition using (Pr_xY_1-x)Ba₂Cu₃O _7-δ [(Pr_xY_1-x)BCO] (1≥x≥0) as buffer layers and cap layers. The films of 1 unit cell thick were superconducting for all the x values while T_c increased when x was reduced. For adjacent layers of (Pr_0.6Y_0.4)BCO which is semiconducting, a T_c of 43 K and J_c of 2×10 ⁶ A/cm² for B∥ab and 4×10⁵ A/cm ² for B⊥ab at B=7 T and 4.2 K were obtained in a one-unit cell thick YBCO layer. The J_c values of a few unit cell thick YBCO layers nearly approached that of thick YBCO films. The results suggest the absence of significant weak-link effects in these films.

Original language	English (US)
Pages (from-to)	1289-1291
Number of pages	3
Journal	Applied Physics Letters
Volume	62
Issue number	11
DOIs	https://doi.org/10.1063/1.108710
State	Published - 1993

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.108710

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@article{00c394fc4e6f44eea82785327f64ca2f,

title = "High critical current densities in ultrathin YBa2Cu 3O7-δ films sandwiched between (PrxY 1-x)Ba2Cu3O7-δ layers",

abstract = "YBa2Cu3O7-δ (YBCO) films with nominal thicknesses of 1-4 unit cells were grown by pulsed laser deposition using (PrxY1-x)Ba2Cu3O 7-δ [(PrxY1-x)BCO] (1≥x≥0) as buffer layers and cap layers. The films of 1 unit cell thick were superconducting for all the x values while Tc increased when x was reduced. For adjacent layers of (Pr0.6Y0.4)BCO which is semiconducting, a Tc of 43 K and Jc of 2×10 6 A/cm2 for B∥ab and 4×105 A/cm 2 for B⊥ab at B=7 T and 4.2 K were obtained in a one-unit cell thick YBCO layer. The Jc values of a few unit cell thick YBCO layers nearly approached that of thick YBCO films. The results suggest the absence of significant weak-link effects in these films.",

author = "C. Kwon and Qi Li and Xi, {X. X.} and S. Bhattacharya and C. Doughty and T. Venkatesan and H. Zhang and Lynn, {J. W.} and Peng, {J. L.} and Li, {Z. Y.} and Spencer, {N. D.} and K. Feldman",

year = "1993",

doi = "10.1063/1.108710",

language = "English (US)",

volume = "62",

pages = "1289--1291",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

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TY - JOUR

T1 - High critical current densities in ultrathin YBa2Cu 3O7-δ films sandwiched between (PrxY 1-x)Ba2Cu3O7-δ layers

AU - Kwon, C.

AU - Li, Qi

AU - Xi, X. X.

AU - Bhattacharya, S.

AU - Doughty, C.

AU - Venkatesan, T.

AU - Zhang, H.

AU - Lynn, J. W.

AU - Peng, J. L.

AU - Li, Z. Y.

AU - Spencer, N. D.

AU - Feldman, K.

PY - 1993

Y1 - 1993

N2 - YBa2Cu3O7-δ (YBCO) films with nominal thicknesses of 1-4 unit cells were grown by pulsed laser deposition using (PrxY1-x)Ba2Cu3O 7-δ [(PrxY1-x)BCO] (1≥x≥0) as buffer layers and cap layers. The films of 1 unit cell thick were superconducting for all the x values while Tc increased when x was reduced. For adjacent layers of (Pr0.6Y0.4)BCO which is semiconducting, a Tc of 43 K and Jc of 2×10 6 A/cm2 for B∥ab and 4×105 A/cm 2 for B⊥ab at B=7 T and 4.2 K were obtained in a one-unit cell thick YBCO layer. The Jc values of a few unit cell thick YBCO layers nearly approached that of thick YBCO films. The results suggest the absence of significant weak-link effects in these films.

AB - YBa2Cu3O7-δ (YBCO) films with nominal thicknesses of 1-4 unit cells were grown by pulsed laser deposition using (PrxY1-x)Ba2Cu3O 7-δ [(PrxY1-x)BCO] (1≥x≥0) as buffer layers and cap layers. The films of 1 unit cell thick were superconducting for all the x values while Tc increased when x was reduced. For adjacent layers of (Pr0.6Y0.4)BCO which is semiconducting, a Tc of 43 K and Jc of 2×10 6 A/cm2 for B∥ab and 4×105 A/cm 2 for B⊥ab at B=7 T and 4.2 K were obtained in a one-unit cell thick YBCO layer. The Jc values of a few unit cell thick YBCO layers nearly approached that of thick YBCO films. The results suggest the absence of significant weak-link effects in these films.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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ER -

High critical current densities in ultrathin YBa₂Cu ₃O_7-δ films sandwiched between (Pr_xY _1-x)Ba₂Cu₃O_7-δ layers

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