YBa₂Cu₃O_7-y−coated conductors with high engineering current density

Abstract

Short segments of YBa2Cu3O7-y (YBCO) coated conductors were fabricated on rolling-assisted biaxially textured substrates (RABiTS) with a layer sequence of CeO2/YSZ/Ni using an ex situ BaF2 precursor process. Pulsed laser deposition (PLD) was used to deposit both YSZ and CeO2 layers. The YBCO films were grown using e-beam coevaporated Y–BaF2–Cu precursors followed by postannealing. An overall engineering current density, JE, of 28,000 A/cm2 and critical current, Ic, of 147 A/cm width at 77 K were achieved for a 1.6-μm-thick YBCO film. This result demonstrates the possibility of using both the ex situ BaF2 precursor approach and the RABiTS process for producing long lengths of high-JE coated conductors.

Interactions of Ba2YCu3O6+x with SrTiO3 substrate

“…High-temperature superconductors have demonstrated potential for meeting these needs. Consequently, there has been an accelerated effort within the high T c community on research and development of coated conductors for wire/tape applications [1][2][3][4][5][6][7]. For this application, Ba 2 YCu 3 O x (Y-213) and Ba 2 RCu 3 O x (R = lanthanides) are the principal superconducting materials.…”

“…The two principal state-of-the-art technologies for producing biaxially-textured substrates are Ion Beam Assisted Deposition (IBAD) [1,2], and Rolling Assisted Bi-axially Textured Substrate (RABiTS) [3][4][5][6][7]. This paper is relevant to the RABiTS architecture.…”

Kinetic Studies of the Interfacial Reaction of the Ba2YCu3O6+x Superconductor with a CeO2 Buffer

“…High-temperature superconductors have demonstrated potential for meeting these needs, 1 leading to an accelerated effort within the high-T c community on research and development of coated conductors for wire and tape applications. [2][3][4][5][6][7][8] These coated conductors are based on Ba 2 YCu 3 O x (Y-213) and Ba 2 RCu 3 O x (R = lanthanides) as the principal superconductors. They can be deposited on flexible metallic tapes using various deposition techniques, and the resulting materials show excellent current-carrying capability.…”

“…The two promising technologies for producing biaxially textured buffers or substrates are commonly known as ion-beam-assisted deposition (IBAD), 2,3 developed at Los Alamos National Laboratory, and rolling assisted biaxially textured substrate (RABiTS), [4][5][6][7][8] developed at Oak Ridge National Laboratory. Typically, the architecture of a RABiTS film includes a number of buffer layers of different materials deposited on the biaxially textured metallic substrate.…”

Fabrication and X-ray characterization of biaxially textured thick film EuBa2Cu3O7−δ homo-substrates

“…The YBCO coated conductors with a current density over 1 mA/cm 2 have been demonstrated [2,4,5]. However, it has been reported that the J c decreases rapidly as the thickness of an epitaxial YBCO layer increases either on a single-crystal substrate or a metallic substrate [6][7][8][9]. The reason for the J c drop, which seems to be universal regardless of the deposition technique, is not clear.…”