Iridium: An oxygen diffusion barrier and a conductive seed layer for RABiTS-based coated conductors

T. Aytug; M. Paranthaman; H. Y. Zhai; K. J. Leonard; A. A. Gapud; J. R. Thompson; P. M. Martin; A. Goyal; D. K. Christen

doi:10.1109/TASC.2005.848690

Iridium: An oxygen diffusion barrier and a conductive seed layer for RABiTS-based coated conductors

T. Aytug, M. Paranthaman, H. Y. Zhai, K. J. Leonard, A. A. Gapud, J. R. Thompson, P. M. Martin, A. Goyal, D. K. Christen

Nanomaterials Chemistry Group

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

6 Scopus citations

Abstract

For power applications of YBa₂Cu₃O _7-δ (YBCO) coated conductors, it is necessary to electrically stabilize the conductor. An economic way to achieve this, which also benefits the engineering JE, is to grow conductive buffer layers directly on textured Cu or Ni metal surfaces. However, due to poor oxidation resistance and high reactivity/diffusivity of Cu or Ni, an insulating oxide layer usually forms at the metal/substrate interface, degrading the electrical connectivity of the entire architecture. To overcome this problem, we have developed a new conductive, nonmagnetic buffer layer architecture of La_0.7Sr _0.3MnO₃/Ir on textured Ni-based tapes. This structure serves as a barrier to both inward diffusion of oxygen and outward diffusion of metal cations. Using PLD to grow YBCO, we demonstrate ideal electrical coupling to the metal substrate. Critical current (I_c) values for 1 μm thick YBCO coatings exceed 100 A/cm-width at 77 K on a Ni-W RABiTS template.

Original language	English
Pages (from-to)	2977-2980
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	15
Issue number	2 PART III
DOIs	https://doi.org/10.1109/TASC.2005.848690
State	Published - Jun 2005

Funding

Manuscript received October 5, 2004. This work was supported by the U.S. Department of Energy, Office of Electric Transmission and Distribution. The research was performed at the Oak Ridge National Laboratory, managed by U.T.-Battelle, LLC for the USDOE under Contract no. DE-AC05-00OR22725.

Keywords

Buffer layers
Coated conductors
High temperature superconductors
Oxygen diffusion barrier
RABiTS

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title = "Iridium: An oxygen diffusion barrier and a conductive seed layer for RABiTS-based coated conductors",

abstract = "For power applications of YBa2Cu3O 7-δ (YBCO) coated conductors, it is necessary to electrically stabilize the conductor. An economic way to achieve this, which also benefits the engineering JE, is to grow conductive buffer layers directly on textured Cu or Ni metal surfaces. However, due to poor oxidation resistance and high reactivity/diffusivity of Cu or Ni, an insulating oxide layer usually forms at the metal/substrate interface, degrading the electrical connectivity of the entire architecture. To overcome this problem, we have developed a new conductive, nonmagnetic buffer layer architecture of La0.7Sr 0.3MnO3/Ir on textured Ni-based tapes. This structure serves as a barrier to both inward diffusion of oxygen and outward diffusion of metal cations. Using PLD to grow YBCO, we demonstrate ideal electrical coupling to the metal substrate. Critical current (Ic) values for 1 μm thick YBCO coatings exceed 100 A/cm-width at 77 K on a Ni-W RABiTS template.",

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author = "T. Aytug and M. Paranthaman and Zhai, {H. Y.} and Leonard, {K. J.} and Gapud, {A. A.} and Thompson, {J. R.} and Martin, {P. M.} and A. Goyal and Christen, {D. K.}",

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AU - Paranthaman, M.

AU - Zhai, H. Y.

AU - Leonard, K. J.

AU - Gapud, A. A.

AU - Thompson, J. R.

AU - Martin, P. M.

AU - Goyal, A.

AU - Christen, D. K.

PY - 2005/6

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N2 - For power applications of YBa2Cu3O 7-δ (YBCO) coated conductors, it is necessary to electrically stabilize the conductor. An economic way to achieve this, which also benefits the engineering JE, is to grow conductive buffer layers directly on textured Cu or Ni metal surfaces. However, due to poor oxidation resistance and high reactivity/diffusivity of Cu or Ni, an insulating oxide layer usually forms at the metal/substrate interface, degrading the electrical connectivity of the entire architecture. To overcome this problem, we have developed a new conductive, nonmagnetic buffer layer architecture of La0.7Sr 0.3MnO3/Ir on textured Ni-based tapes. This structure serves as a barrier to both inward diffusion of oxygen and outward diffusion of metal cations. Using PLD to grow YBCO, we demonstrate ideal electrical coupling to the metal substrate. Critical current (Ic) values for 1 μm thick YBCO coatings exceed 100 A/cm-width at 77 K on a Ni-W RABiTS template.

AB - For power applications of YBa2Cu3O 7-δ (YBCO) coated conductors, it is necessary to electrically stabilize the conductor. An economic way to achieve this, which also benefits the engineering JE, is to grow conductive buffer layers directly on textured Cu or Ni metal surfaces. However, due to poor oxidation resistance and high reactivity/diffusivity of Cu or Ni, an insulating oxide layer usually forms at the metal/substrate interface, degrading the electrical connectivity of the entire architecture. To overcome this problem, we have developed a new conductive, nonmagnetic buffer layer architecture of La0.7Sr 0.3MnO3/Ir on textured Ni-based tapes. This structure serves as a barrier to both inward diffusion of oxygen and outward diffusion of metal cations. Using PLD to grow YBCO, we demonstrate ideal electrical coupling to the metal substrate. Critical current (Ic) values for 1 μm thick YBCO coatings exceed 100 A/cm-width at 77 K on a Ni-W RABiTS template.

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Iridium: An oxygen diffusion barrier and a conductive seed layer for RABiTS-based coated conductors

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