scholarly journals RE BCO mixtures with large difference in rare-earth ion size: superconducting properties of chemical solution deposition-grown Yb 1− x Sm x Ba 2 Cu 3 O 7− δ films

2020 ◽  
Vol 7 (11) ◽  
pp. 201257
Author(s):  
Pablo Cayado ◽  
Minjuan Li ◽  
Manuela Erbe ◽  
Zhiyong Liu ◽  
Chuanbing Cai ◽  
...  
Keyword(s):  
Rare Earth ◽  
Chemical Solution Deposition ◽  
Fluorine Content ◽  
Chemical Solution ◽  
Superconducting Properties ◽  
Rare Earth Ion ◽  
Solution Deposition ◽  
Mixed Films ◽  
The One ◽  
Ion Size

The main objective of this work was to study the superconducting properties of RE BCO films with a mixture of rare-earth ( RE ) ions with large difference in ion size, in particular Sm 3+ and Yb 3+ . These Yb 1− x Sm x Ba 2 Cu 3 O 7− δ films have been successfully prepared for the first time by chemical solution deposition following the extremely low-fluorine route, which allows reducing the fluorine content by 93% with respect to standard full trifluoroacetate solutions. On the one hand, critical temperature T c remains stable at approximately 90 K with Sm content up to x = 0.5 where T c starts to increase towards the values of pure SmBCO films of approximately 95 K. On the other hand, the critical current densities J c of the pure SmBCO films are the largest at 77 K, where the influence of a higher T c is very relevant, while at lower temperatures and low fields, the mixed films reach larger values. This demonstrates that mixing rare-earth elements RE in RE Ba 2 Cu 3 O 7− δ causes a change in the pinning properties of the films and reveals the importance of selecting adequate RE BCO compounds according to the temperature and magnetic field region of a desired application.

scholarly journals Properties of Highly Oriented Rare-Earth-Ion-Substituted BaNb2O6Thin Films Synthesized by Chemical Solution Deposition

2003 ◽  
Vol 42 (Part 1, No. 9B) ◽  
pp. 5913-5917 ◽  
Author(s):  
Wataru Sakamoto ◽  
Masanari Mizuno ◽  
Toshiaki Yamaguchi ◽  
Koichi Kikuta ◽  
Shin-ichi Hirano
Keyword(s):  
Rare Earth ◽  
Chemical Solution Deposition ◽  
Chemical Solution ◽  
Rare Earth Ion ◽  
Solution Deposition

Processing and Properties of Rare Earth Ion-Doped Bismuth Titanate Thin Films by Chemical Solution Deposition method

2003 ◽  
Vol 42 (Part 1, No. 8) ◽  
pp. 5222-5226 ◽  
Author(s):  
Mio Yamada ◽  
Naoya Iizawa ◽  
Toshiaki Yamaguchi ◽  
Wataru Sakamoto ◽  
Koichi Kikuta ◽  
...  
Keyword(s):  
Thin Films ◽  
Rare Earth ◽  
Chemical Solution Deposition ◽  
Bismuth Titanate ◽  
Deposition Method ◽  
Chemical Solution ◽  
Rare Earth Ion ◽  
Solution Deposition ◽  
Chemical Solution Deposition Method

Deposition of rare earth tantalate buffers on textured Ni-W substrates for YBCO coated conductor using chemical solution deposition approach

2006 ◽  
Vol 21 (3) ◽  
pp. 767-773 ◽  
Author(s):  
M.S. Bhuiyan ◽  
M. Paranthaman ◽  
A. Goyal ◽  
L. Heatherly ◽  
D.B. Beach
Keyword(s):  
Rare Earth ◽  
Chemical Solution Deposition ◽  
Precursor Solution ◽  
Coated Conductors ◽  
Buffer Layers ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Force Microscopy ◽  
Atomic Force ◽  
Ybco Coated Conductors

Epitaxial films of rare-earth (RE = La, Ce, Eu, and Gd) tantalates, RE3TaO7 with pyrochlore structures were grown on biaxially textured nickel-3 at.% tungsten (Ni-W) substrates using chemical solution deposition (CSD) process. Precursor solution of 0.3∼0.4 M concentration of total cations were spin coated on to short samples of Ni-W substrates and the films were crystallized at 1050∼1100 °C in a gas mixture of Ar- 4% H2 for 15 to 60 min. X-ray studies show that the films of pyrochlore RE tantalate films are highly textured with cube-on-cube epitaxy. Improved texture was observed in case of lanthanum tantalate (La3TaO7) film grown on Ni-W substrates. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) investigations of RE3TaO7 films reveal a fairly dense and smooth microstructure without cracks and porosity. The rare-earth tantalate layers may be potentially used as buffer layers for YBa2Cu3O7-δ (YBCO) coated conductors.

scholarly journals Rapid Pyrolysis of SmBa2Cu3O7-δ Films in CSD-MOD Using Extremely-Low-Fluorine Solutions

Coatings ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 31 ◽  
Author(s):  
Minjuan Li ◽  
Pablo Cayado ◽  
Manuela Erbe ◽  
Alexandra Jung ◽  
Jens Hänisch ◽  
...  
Keyword(s):  
Crystallization Temperature ◽  
Chemical Solution Deposition ◽  
Growth Process ◽  
Chemical Solution ◽  
Superconducting Properties ◽  
Heating Rates ◽  
Critical Temperatures ◽  
Solution Deposition ◽  
Rapid Pyrolysis

SmBa2Cu3O7-δ (SmBCO) films have been prepared by chemical solution deposition starting from extremely-low-fluorine solutions (7% fluorine with respect to standard full trifluoroacetate solutions). Smooth and homogeneous SmBCO films could be achieved at heating rates of up to 20 °C/min during pyrolysis. The best films were achieved at a crystallization temperature of 810 °C and 50 ppm of oxygen partial pressure. At these conditions, the ~270 nm thick SmBCO films grow mostly c-axis-oriented with J c sf values at 77 K of ~2 MA/cm2 and critical temperatures Tc of up to 95.0 K. These results demonstrate that using extremely-low-fluorine solutions is very attractive since the production rate can be largely increased due to the solutions’ robustness during pyrolysis retaining a remarkable quality of the grown films. Nevertheless, further optimization of the growth process is needed to improve the superconducting properties of the films.

Epitaxial Growth of Solution-Based Rare-Earth Niobate, RE3NbO7, Films on Biaxially Textured Ni–W Substrates

2005 ◽  
Vol 20 (1) ◽  
pp. 6-9 ◽  
Author(s):  
M. Paranthaman ◽  
M.S. Bhuiyan ◽  
S. Sathyamurthy ◽  
H.Y. Zhai ◽  
A. Goyal ◽  
...  
Keyword(s):  
Rare Earth ◽  
Critical Current Density ◽  
Epitaxial Growth ◽  
Chemical Solution Deposition ◽  
Ybco Film ◽  
Pulsed Laser ◽  
Buffer Layers ◽  
Laser Deposition ◽  
Chemical Solution ◽  
Solution Deposition

A new series of rare earth-niobate, RE3NbO7 (RE=Y,Gd,Eu), buffer layers were developed for the growth of superconducting YBa2Cu3O7−δ (YBCO) films on biaxially textured Ni–W (3 at.%) substrates. Using chemical solution deposition, smooth, crack-free, and epitaxial RE3NbO7 (RE = Y,Gd,Eu) films were grown on cube-textured Ni–W substrate. YBCO film with a critical current density of 1.1 × 106 A/cm2 in self-field at 77 K was grown directly on a single Gd3NbO7-buffered Ni–W substrate using pulsed laser deposition.

scholarly journals CSD-Grown Y1−xGdxBa2Cu3O7−δ-BaHfO3 Nanocomposite Films on Ni5W and IBAD Technical Substrates

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 21 ◽  
Author(s):  
Pablo Cayado ◽  
Hannes Rijckaert ◽  
Manuela Erbe ◽  
Marco Langer ◽  
Alexandra Jung ◽  
...  
Keyword(s):  
Chemical Solution Deposition ◽  
Growth Process ◽  
Growth Conditions ◽  
Coated Conductors ◽  
Nanocomposite Films ◽  
Chemical Solution ◽  
Superconducting Properties ◽  
High Quality ◽  
Solution Deposition ◽  
Structure Morphology

Chemical solution deposition (CSD) was used to grow Y1−xGdxBa2Cu3O7−δ-BaHfO3 (YGBCO-BHO) nanocomposite films containing 12 mol% BHO nanoparticles and various amounts of Gd, x, on two kinds of buffered metallic tapes: Ni5W and IBAD. The influence of the rare-earth stoichiometry on structure, morphology and superconducting properties of these films was studied. The growth process was carefully studied in order to find the most appropriate growth conditions for each composition and substrate. This led to a clear improvement in film quality, probably due to the reduction of BaCeO3 formation. In general, the superconducting properties of the films on Ni5W are significantly better. For x > 0.5, epitaxial ~270 nm thick YGBCO-BHO films with Tc > 93 K and self-field Jc at 77 K ~2 MA/cm² were obtained on Ni5W. These results highlight the potential of this approach for the fabrication of high-quality coated conductors.

Characterization of the Interface Between Lanthanum Hexa-Aluminate and Sapphire by Exit Wave Reconstruction

1999 ◽  
Vol 589 ◽  
Author(s):  
B. Wessler ◽  
A. Steinecker ◽  
W. Mader
Keyword(s):  
Thin Films ◽  
Rare Earth ◽  
Chemical Solution Deposition ◽  
Epitaxial Thin Films ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Coordination Polyhedra ◽  
Cation Layer ◽  
Different Types

AbstractEpitaxial thin films of rare-earth hexaaluminates on basal plane sapphire have been produced by chemical solution deposition. LaAl11O18 films with magnetoplumbite structure grow with (0001)HA||(0001)S and [1100]HA||[2110]s orientation relationshipTo investigate the stucture of the interface exit wave reconstruction of focus series was carried out using a field emission TEM. Due to the inversion of the imaging process major artefacts at the interface can be eliminated. Exit waves were simulated based on different interface models and were compared with the reconstructed waves to localize the positions of the atoms at the interface. Two different types of interfaces were observed in the samples. One of the types, in which the spinel block of hexaaluminate faces the sapphire with the mixed cation layer with occupied octahedra and tetrahedra, is characterized in detail. Face-sharing of coordination polyhedra is avoided to large extent

Sign in / Sign up

Export Citation Format

Share Document