Single buffer layers of LaMnO3 or La0.7Sr0.3MnO3 for the development of Yba2Cu3O7−δ-coated conductors: A comparative study

2002 ◽  
Vol 17 (9) ◽  
pp. 2193-2196 ◽  
Author(s):  
T. Aytug ◽  
M. Paranthaman ◽  
H. H. Zhai ◽  
H. H. Christen ◽  
S. Sathyamurthy ◽  
...  
Keyword(s):  
Superconducting Property ◽  
Pulsed Laser ◽  
Sputter Deposition ◽  
Coated Conductors ◽  
Buffer Layers ◽  
Laser Deposition ◽  
Ybco Films ◽  
Ni Alloy ◽  
Current Densities ◽  
Ybco Coated Conductors

Single, epitaxial buffer layers of insulating LaMnO3 (LMO) or conductive La0.7Sr0.3MnO3 (LSMO) have been grown by sputter deposition on biaxially textured Ni and Ni–alloy substrates. We report baseline investigations of their compatibility with the Yba2Cu3O7−δ (YBCO) coatings and demonstrate biaxially textured YBCO films grown by pulsed-laser deposition on these single-buffered tapes. Superconducting property characterizations revealed better properties for YBCO films on LMO-buffered tapes relative to those grown on LSMO layers. Self-field critical current densities (Jc) exceeding 1 × 106 A/cm2 at 77 K have been obtained for the YBCO (200 nm) films on LMO-buffer layers. These results offer prospects for the use of single, LMO-buffered metal tapes in the development of practical YBCO-coated conductors.

Development of conducting buffer architectures using cube textured IBAD-TiN layers

2008 ◽  
Vol 1150 ◽  
Author(s):  
Ruben Hühne ◽  
Konrad Güth ◽  
Martin Kidszun ◽  
Rainer Kaltofen ◽  
Vladimir Matias ◽  
...  
Keyword(s):  
Ion Beam ◽  
Pulsed Laser ◽  
Coated Conductors ◽  
Buffer Layers ◽  
Laser Deposition ◽  
Tin Films ◽  
Ion Beam Assisted Deposition ◽  
Conductive Oxide ◽  
Ybco Coated Conductors ◽  
Seed Layers

AbstractIon-beam assisted deposition (IBAD) offers the possibility to prepare thin textured films on amorphous or non-textured substrates. In particular, the textured nucleation of TiN is promising for the development of a conducting buffer layer architecture for YBCO coated conductors based on the IBAD approach. Accordingly, cube textured IBAD-TiN layers have been deposited reactively using pulsed laser deposition on Si/Si3N4 substrates as well as on polished Hastelloy tapes using different amorphous seed layers. Metallic buffer layers such as Au, Pt or Ir were grown epitaxially on top of the TiN layer showing texture values similar to the IBAD layer. Smooth layers were obtained using a double layer of Au/Pt or Au/Ir. Biaxially textured YBCO layers were achieved using SrRuO3 or Nb-doped SrTiO3 as a conductive oxide cap layer. Finally, different amorphous conducting seed layers were applied for the IBAD-TiN process. Highly textured TiN films were achieved on amorphous Ta0.75Ni0.25 layers showing a similar in-plane orientation of about 8° as on standard seed layers.

YBCO-Coated Conductors Manufactured by High-Rate Pulsed Laser Deposition

MRS Bulletin ◽  
2004 ◽  
Vol 29 (8) ◽  
pp. 583-589 ◽  
Author(s):  
Alexander Usoskin ◽  
Herbert C. Freyhardt
Keyword(s):  
Pulsed Laser Deposition ◽  
High Temperature Superconductors ◽  
Pulsed Laser ◽  
Critical Currents ◽  
Coated Conductors ◽  
Laser Deposition ◽  
High Rate ◽  
Quasi Equilibrium ◽  
Ybco Films ◽  
Ybco Coated Conductors

AbstractHigh-temperature superconductors of the second generation—coated conductors—are based on an architecture of YBCO films deposited on a well-textured substrate tape. The deposition technique used in the processing of YBCO films is responsible not only for both the resulting critical currents in the conductors and the cost efficiency of the employed production route, but also for the ultimate viability of the chosen technology. This article describes an advanced deposition method for YBCO films using high-rate pulsed laser deposition (HR-PLD).An elaborate variable azimuth ablation allows target roughening to be considerably reduced in the course of continuous deposition, and as a result, the integral deposition speed and speed stability can be increased to technologically interesting high values.Well-selected process parameters have been demonstrated to yield high currents of up to 480A/cm-width in short tapes and 360A/cm-width in 6-m-long tapes.Together with quasi-equilibrium heating, the HR-PLD method allows the processing of long-length YBCO-coated conductors and offers a cost-efficient route for their production on an industrial scale.

YBa2Cu3O7-y−coated conductors with high engineering current density

2000 ◽  
Vol 15 (12) ◽  
pp. 2647-2652 ◽  
Author(s):  
M. Paranthaman ◽  
C. Park ◽  
X. Cui ◽  
A. Goyal ◽  
D. F. Lee ◽  
...  
Keyword(s):  
Pulsed Laser Deposition ◽  
Critical Current ◽  
Current Density ◽  
Ybco Film ◽  
Pulsed Laser ◽  
Coated Conductors ◽  
Laser Deposition ◽  
Ex Situ ◽  
Layer Sequence ◽  
Ybco Coated Conductors

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.

Ybco Films and Buffer‐Layers Grown In‐Situ by Pulsed Laser Deposition

1989 ◽  
Vol 169 ◽  
Author(s):  
G. A. N. Connell ◽  
D. B. Fenner ◽  
D. K. Fork ◽  
J.B. Boyce ◽  
F.A. Ponce ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Electrical Properties ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Buffer Layers ◽  
Laser Deposition ◽  
Ybco Films ◽  
Structural And Electrical Properties

AbstractYSZ [ (Y2O3)x (ZrO2)1‐x ] buffer‐layers for various compositions, x, and YBCO (Y1Ba2Cu3O7‐δ) films were grown on hydrogen‐terminated Si(100) substrates by laser ablation. The structural and electrical properties of the YBCO are found to depend strongly on x, and to be optimized near x=0.1.

High-Jc YBCO coatings on reel-to-reel dip-coated Gd2O3 seed buffer layers epitaxially fabricated on biaxially textured Ni and Ni-(3at%W-1.7at%Fe) alloy tapes

2001 ◽  
Vol 689 ◽  
Author(s):  
Tolga Aytug ◽  
M. Paranthaman ◽  
S. Sathyamurthy ◽  
B. W. Kang ◽  
D. B. Beach ◽  
...  
Keyword(s):  
Low Cost ◽  
Dip Coating ◽  
Buffer Layers ◽  
Ex Situ ◽  
X Ray Diffraction ◽  
Ybco Films ◽  
Ni Alloy ◽  
Current Densities ◽  
Alloy Metal

ABSTRACTA low-cost, non-vacuum reel-to reel dip-coating system has been used to continuously fabricate epitaxial Gd2O3 buffer layers on mechanically strengthened, biaxially textured Ni- (3at.%W-1.7at%Fe), defined as Ni-alloy, metal tapes. X-ray diffraction analysis of the seed Gd2O3 layers indicated that well textured films can be obtained at processing temperatures (Tp) between 1100 and 1175°C. Processing speed did not significantly affect the crystalline quality of the Gd2O3. Scanning electron microscopy revealed a continuous, dense and crack-free surface morphology for these dip-coated buffers. The Gd2O3 layer thickness led to remarkable differences in the growth characteristics of the subsequent YSZ and CeO2 layers deposited by rfmagnetron sputtering. Epitaxial YBCO films grown by pulsed laser deposition on the short prototype CeO2/YSZ/Gd2O3/Ni-(3at%W-1.7at%Fe) conductors yielded self-field critical current densities (Jc) as high as 1.2×106 A/cm2 at 77 K. Pure Ni tapes were used to asses the viability of dip-coated buffers for long length coated conductor fabrication. The YBCO films, grown on 80 cm long and 1 cm wide CeO2/YSZ/Gd2O3 buffered Ni tapes by the industrially scalable ex-situ BaF2 precursor process, exhibited end-to-end self-field Jc of 6.25×105 A/cm2 at 77 K.

scholarly journals Fabrication by Inclined-Substrate Deposition of Biaxially Textured Buffer Layer for Coated Conductors

2001 ◽  
Vol 689 ◽  
Author(s):  
U. Balachandran ◽  
B. Ma ◽  
M. Li ◽  
R. E. Koritala ◽  
B. L. Fisher ◽  
...  
Keyword(s):  
Coated Conductors ◽  
Buffer Layers ◽  
Laser Deposition ◽  
High Quality ◽  
X Ray ◽  
Roof Tile ◽  
Grain Structures ◽  
Rapid Production ◽  
Columnar Grain ◽  
Ybco Coated Conductors

ABSTRACTInclined substrate deposition (ISD) offers the potential for rapid production of high-quality biaxially textured buffer layers suitable for YBCO-coated conductors. We have grown biaxially textured MgO films by ISD at deposition rates of 20–100 Å/sec. Columnar grain structures with a roof-tile-shaped surface were observed in the ISD-MgO films. X-ray pole figure analysis revealed that the (002) planes of the ISD-MgO films are titled at an angle from the substrate normal. A small phi-scan full-width at half maximum (FWHM) of ≈9° was observed on MgO films deposited at an inclination angle of 55°. YBCO films were also grown on ISD-MgO-buffered Hastelloy C276 substrates by pulsed laser deposition. We obtained a critical current density of ≈2 × 105 A/cm2 at 77 K in self-field on 0.5-μm-thick, 0.5-cm-wide, 1-cm-long samples. This work has demonstrated that biaxially textured ISD MgO buffer layers deposited on metal substrates are promising candidates for fabrication of high-quality YBCO-coated conductors.

scholarly journals Development of meter-long YBCO coated conductors produced by ion beam assisted deposition and pulsed laser deposition

2000 ◽  
Vol 341-348 ◽  
pp. 2305-2308 ◽  
Author(s):  
S.R. Foltyn ◽  
P.N. Arendt ◽  
R.F. DePaula ◽  
P.C. Dowden ◽  
J.Y. Coulter ◽  
...  
Keyword(s):  
Pulsed Laser Deposition ◽  
Ion Beam ◽  
Pulsed Laser ◽  
Coated Conductors ◽  
Laser Deposition ◽  
Ion Beam Assisted Deposition ◽  
Ybco Coated Conductors
Sign in / Sign up

Export Citation Format

Share Document