Fabrication of High-Quality Ion-Beam Deposited Cubic Oxide Template Films on Meter-Length Substrates

1999 ◽  
Vol 585 ◽  
Author(s):  
P. N. Arendt ◽  
J. R. Groves ◽  
S. R. Foltyn ◽  
Q. X. Jia ◽  
E. J. Peterson ◽  
...  
Keyword(s):  
Ion Beam ◽  
Short Length ◽  
Stationary Mode ◽  
Superconducting Properties ◽  
High Quality ◽  
Ybco Films ◽  
Cubic Zirconia ◽  
Ion Beam Assisted Deposition ◽  
Flexible Metal

AbstractIon-beam assisted deposition was used to fabricate biaxially aligned cubic zirconia on flexible metal substrates. These films were used as templates for heteroepitaxially deposited YBa2Cu3O7-δ (YBCO) films. The quality of the crystalline texture of the template films has a direct influence on the superconducting properties of the final YBCO films. We describe our efforts to fabricate high-quality cubic zirconia templates on short-length substrates processed in stationary mode and meter-long substrates processed in continuous mode. Our best phi scan FWHM values for the films on the meter-long tapes were 12.6 degrees for the template and 6.1 degrees for the overcoated YBCO. This meter-long tape had a self-field, 75 K, superconducting critical current of 122 amps.

Reactive Co-Evaporation of YBCO for 2G HTS Tapes

2007 ◽  
Vol 1001 ◽  
Author(s):  
Jonathan Storer ◽  
Jens Hänisch ◽  
Chris Sheehan ◽  
Vladimir Matias
Keyword(s):  
Critical Current ◽  
Ion Beam ◽  
Polycrystalline Metal ◽  
Ion Beam Assisted Deposition ◽  
Super Conducting ◽  
Current Densities ◽  
Flexible Metal ◽  
Mgo Layers ◽  
Hts Films ◽  
Proof Of Principle

AbstractWe present a new reel-to-reel method for growth of high temperature super-conducting (HTS) films by reactive co-evaporation on flexible metal tapes. We have demonstrated proof of principle for this method with a small laboratory-scale setup using 8 cm long tape pieces. YBa2Cu3O7-δ is deposited on ion-beam assisted deposition textured MgO layers on top of flexible polycrystalline metal tapes. Critical current densities at 75.5 K of over 2 MA/cm2 have been achieved in HTS films with over 2 μm in thickness, yielding a self field critical current of 450 A/cm-width. A 4.5 μm thick film had a self field critical current of 590 A/cm. We discuss some practical possibilities for manufacturing of superconducting wire using this process and present new areas of research that are still needed.

Significant texture improvement in single-crystalline-like materials on low-cost flexible metal foils through growth of silver thin films

2019 ◽  
Vol 52 (4) ◽  
pp. 898-902 ◽  
Author(s):  
Yongkuan Li ◽  
Sicong Sun ◽  
Ying Gao ◽  
Yao Yao ◽  
Eduard Galstyan ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Ion Beam ◽  
High Temperature Superconductors ◽  
Single Crystalline ◽  
Metal Foils ◽  
Ion Beam Assisted Deposition ◽  
Out Of Plane ◽  
Flexible Metal ◽  
Ag Film

Low texture spreads of single-crystalline-like materials are critical for high performance of low-cost flexible semiconductors and second-generation high-temperature superconductors based on metal foils. For texture improvement, a single-crystalline-like Ag film is epitaxially grown on an ion-beam-assisted deposition TiN substrate using magnetron sputtering. Ultra-low texture spreads are found in the thin Ag film (∼330 nm), with an out-of-plane texture spread (Δω) of ∼1.03° and an in-plane texture spread (Δϕ) of ∼1.34°. Compared with the texture spreads of the TiN substrate, Δω and Δϕ of the Ag film are reduced by ∼42 and ∼79%, respectively. Applying this Ag buffer, the texture spreads of a single-crystalline-like Ge film are reduced by ∼37% (Δω) and ∼36% (Δϕ). Factors contributing to the texture improvement by Ag are studied using single-crystalline-like Ag films with various thicknesses.

Preparation of biaxially aligned cubic zirconia films on pyrex glass substrates using ion‐beam assisted deposition

1993 ◽  
Vol 74 (2) ◽  
pp. 1027-1034 ◽  
Author(s):  
N. Sonnenberg ◽  
A. S. Longo ◽  
M. J. Cima ◽  
B. P. Chang ◽  
K. G. Ressler ◽  
...  
Keyword(s):  
Ion Beam ◽  
Pyrex Glass ◽  
Cubic Zirconia ◽  
Glass Substrates ◽  
Ion Beam Assisted Deposition ◽  
Zirconia Films

Influence of the Substrate Temperature on the Texture of MgO Films Grown by Ion Beam Assisted Deposition

2005 ◽  
Vol 868 ◽  
Author(s):  
Liliana Stan ◽  
Paul N. Arendt ◽  
Raymond F. DePaula ◽  
Igor Usov ◽  
James R. Groves
Keyword(s):  
Substrate Temperature ◽  
Ion Beam ◽  
Orientation Distribution ◽  
Beam Current ◽  
Energetic Ions ◽  
Ion Beam Assisted Deposition ◽  
Acceptable Deviation ◽  
Substrate Temperatures ◽  
Deposition Conditions

AbstractThe variation in the substrate temperature during ion beam assisted deposition (IBAD), which employs the use of energetic ions to bombard a growing film, has been shown to influence the quality of crystalline texture in MgO films. Determining the acceptable deviation from the optimum ion to molecule ratio for different substrate temperatures establishes the optimum MgO deposition conditions. For each fixed deposition temperature, a set of samples was produced by varying the ion assist beam current from sample to sample while keeping the deposition rate constant. In this way, the ion to molecule ratio was modified and the range of achieving well textured films was determined. The investigation of the MgO texture dependence on the substrate temperature reveals that the best in-plane alignment is obtained at ˜ 25°C. At this temperature, MgO films with in-plane orientation distribution as low as 3.7° full width at half maximum (FWHM) have been attained. MgO films deposited at temperatures higher than 100°C have broad in-plane alignment. Although, the deposition at the lowest temperature (-150°C) did not improve the in-plane texture, the acceptable deviation from the optimum ion to molecule ratio for achieving biaxially textured films was the largest. As a trend, the acceptable ion to molecule deviation decreases with increasing substrate temperature. This is especially important for continuous IBAD MgO depositions where less restrictive conditions are desired.

Biaxially Textured Buffer Layers on Large-Area Polycrystalline Substrates

1999 ◽  
Vol 585 ◽  
Author(s):  
J. Dzick ◽  
S. Sievers ◽  
J. Hoffmann ◽  
K. Thiele ◽  
F. Garcia-Moreno ◽  
...  
Keyword(s):  
Room Temperature ◽  
Ion Beam ◽  
Thermal Contact ◽  
Deposition Process ◽  
Ion Sources ◽  
Buffer Layers ◽  
Large Area ◽  
Ybco Films ◽  
Ion Beam Assisted Deposition ◽  
Temperature Deposition

AbstractBiaxially textured yttria stabilized zirconia (YSZ) buffer layers were deposited on long polycrystalline metallic tapes by an ion-beam-assisted deposition process (IBAD) to serve as templates for high-current carrying Y1Ba2Cu3O7-x (YBCO) films. YSZ was deposited by a dualionbeam equipment with two 11 cm Kaufman ion sources. The coating of large-area technical substrates, large in comparison with the ion sources, requires substrate movements to render YSZ films of homogeneous texture quality. These movements can hinder cooling of the metallic tapes in the absence of a thermal contact. Therefore, the temperature of those small-heat-capacity substrates could rise to above 100 °C within minutes, causing a decrease of the in-plane alignment of YSZ. The investigation of the temperature dependence of the IBAD process reveals that the best results of the in-plane alignment could be obtained by room temperature deposition. Applying high tape velocities hinder a rise of the deposition temperature to above 90 °C. Therefore, it is possible to deposit YSZ films on metal tapes (up to 60 mm × 1000 mm) with in-plane textures down to 15° full width at half maximum (FWHM), which allow their coating with highcurrent-carrying YBCO films.

Progress towards a low-cost commercial coated conductor

2001 ◽  
Vol 689 ◽  
Author(s):  
Suresh Annavarapu ◽  
Nguyet Nguyen ◽  
Sky Cui ◽  
Urs Schoop ◽  
Cees Thieme ◽  
...  
Keyword(s):  
Critical Current ◽  
High Performance ◽  
Low Cost ◽  
Critical Currents ◽  
Short Length ◽  
Coated Conductor ◽  
High Quality ◽  
Ybco Films ◽  
Performance Levels ◽  
Current Densities

ABSTRACTYBCO films prepared from metal trifluoroacetate (TFA) precursors on oxide-buffered textured non-magnetic substrates have achieved performance levels equaling that on oxide buffered textured Ni substrates. Critical current densities of 0.7 MA/cm2 to 1.0 MA/cm2 have been achieved in 0.4 µm thick YBCO films on short-length of CeO2/YSZ/Y2O3/Ni/Ni-13wt%Cr substrates. High-quality epitaxial buffers comprising a Ni layer, Y2O3 seed, YSZ barrier and CeO2 cap layers have been deposited over meter long tapes of deformation textured Ni and Ni-13%Cr using reel-to-reel processes. High-performance TFA-based YBCO films have been deposited on 0.1 m to 0.3 m lengths of these oxide buffered substrates using reel to reel processes. Critical current densities up to 1.0 MA/cm2 have been achieved in 0.4 µm thick YBCO films on CeO2/YSZ/Y2O3/Ni substrates. Using multiple coats of the metal trifluoroacetate precursors, thicker YBCO films have been demonstrated on oxide buffered substrates. Critical currents in excess of 100A/cm-width have been achieved for 1.2 µm -1.6 µm thick YBCO films on short lengths of CeO2/YSZ/Y2O3/Ni substrates.

High quality HfO 2 thin films prepared by reactive ion beam assisted deposition

2007 ◽  
Author(s):  
Congjuan Wang ◽  
Yunxia Jin ◽  
Jianda Shao ◽  
Zhengxiu Fan
Keyword(s):  
Thin Films ◽  
Ion Beam ◽  
High Quality ◽  
Ion Beam Assisted Deposition

Design and Optimization of HTC DC Squids for Magnetometric Applications

1999 ◽  
Vol 13 (09n10) ◽  
pp. 1277-1282
Author(s):  
G. Testa ◽  
A. Monaco ◽  
C. Camerlingo ◽  
M. Russo ◽  
E. Sarnelli
Keyword(s):  
Magnetic Field ◽  
Grain Boundary ◽  
Superconducting Properties ◽  
Ybco Films ◽  
Design And Optimization ◽  
Noise Characteristics ◽  
Field Sensitivity ◽  
Deposition Processes ◽  
The Magnetic Field

In order to optimize the magnetic field sensitivity [Formula: see text] we have followed two different approaches. In the former we have analyzed the influence of the quality of YBCO films on the superconducting properties and noise characteristics of bicrystal grain boundary junctions and dc-SQUIDs. For this purpose we have studied and compared three different YBCO deposition processes. In the latter we have reported the different criteria for the design of SQUID magnetometers usable for applicalions in shielded and unshielded environment.

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