scholarly journals YBa2Cu3O7 films grown onto SrTiO3 and YSZ substrates by chemical solution deposition of trifluoroacetates

2021 ◽  
Author(s):  
A. Bustamante Domínguez ◽  
L. De Los Santos Valladares ◽  
H. Sanchez Cornejo ◽  
A. M. Osorio-Anaya ◽  
J. Flores Santibañez ◽  
...  
Keyword(s):  
Chemical Solution Deposition ◽  
Magnetic Measurements ◽  
Hole Concentration ◽  
Gaussian Function ◽  
Zero Field ◽  
Chemical Solution ◽  
Secondary Phases ◽  
Solution Deposition ◽  
Rocking Curve ◽  
Field Cooling

AbstractWe report the preparation and characterization of YBa2Cu3O7 (YBCO) films grown onto SrTiO3 and YSZ substrates by the trifluoroacetates chemical solution deposition method and following sintering with oxygen atmosphere at 860 °C. The X-ray diffraction (XRD) reveals (00ℓ) – oriented crystallites indicating epitaxial growth of the films in the c-direction. Despite granular morphology and the presence of Y2BaCuO5 and CuO as minor secondary phases, the technique shows the successful formation of the superconducting YBCO and preventing the formation of the unwanted BaCO3 phase. Rocking curve measurements of the (005) reflection for the YBCO/SrTiO3 was fitted with one Gaussian function with full width at the half maximum (FWHM) of 0.44° confirming that it consists of YBCO crystallites with different texture. For the sample grown on YSZ, the rocking curve was fitted with two Gaussian functions, one corresponding to the YBCO layer (FWHM = 0.4°) and another to the substrate (FWHM = 0.3°). The magnetic measurements taken in zero field cooling and field cooling modes confirm the formation of the superconducting YBCO with critical temperatures (TC) 91.8 and 85.7 K for the samples grown onto YSZ and SrTiO3, respectively. The critical current density (JC) curves indirectly calculated by using the Bean´s model from the M(T) loops were JC ~ 109 A/cm2 for the sample deposited onto YSZ and JC ~ 107A/cm2 for the YBCO deposited onto SrTiO3. Overall, the difference in TC and JC values between both samples could be related to their difference in oxygen content, porosity, hole concentration per Cu ion and the presence of secondary phases.

scholarly journals Chemical Solution Deposition of YBCO Films with Gd Excess

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 860
Author(s):  
Valentina Pinto ◽  
Angelo Vannozzi ◽  
Achille Angrisani Armenio ◽  
Francesco Rizzo ◽  
Andrea Masi ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Chemical Solution Deposition ◽  
Zero Field ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Decomposition Approach ◽  
X Ray ◽  
Transmission Electron ◽  
Different Temperatures ◽  
Metal Organic

Chemical solution deposition of Gd-doped YBCO, Y1GdyBa2Cu3O7−δ, (YBCO-Gd), film was carried out following the metal-organic decomposition approach and in situ route. Two dopant concentrations, 5 and 10 mol %, were evaluated. The morphology and crystalline structure of the superconductor films were deeply investigated. In general, a homogeneous and well c-axis oriented film was observed by using scanning and transmission electron microscopy (SEM and TEM) and X-ray diffraction. However, compared to pure YBCO, YBCO-Gd samples showed an increased stacking faults concentration, as recognized by TEM. X-ray photoelectron spectroscopy allowed studying the Gd distribution in the films and gathered information about the Gd electronic environment. Superconducting properties were evaluated at different temperatures, magnetic field directions, and intensities. Higher zero-field critical current densities were measured with respect to undoped samples in the temperature range from 10 to 77 K with both Gd concentrations (i.e., 28, 27, and 13 MA·cm−2, respectively, for YBCO-Gd 5%, YBCO-Gd 10%, and undoped YBCO at 10 K in self field condition). At low temperatures, this improvement was maintained up to 12 T, confirming the efficacy of Gd addition for the enhancement of transport properties of YBCO film.

scholarly journals Controlling Phase Purity and Texture of K0.5Na0.5NbO3 Thin Films by Aqueous Chemical Solution Deposition

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2042 ◽  
Author(s):  
Nikolai Helth Gaukås ◽  
Silje Marie Dale ◽  
Trygve Magnus Ræder ◽  
Andreas Toresen ◽  
Randi Holmestad ◽  
...  
Keyword(s):  
Thin Films ◽  
Thermal Processing ◽  
Chemical Solution Deposition ◽  
Alkali Metals ◽  
Decomposition Temperature ◽  
Chemical Solution ◽  
Secondary Phases ◽  
Solution Deposition ◽  
Phase Purity ◽  
Phase Pure

Aqueous chemical solution deposition (CSD) of lead-free ferroelectric K0.5Na0.5NbO3 (KNN) thin films has a great potential for cost-effective and environmentally friendly components in microelectronics. Phase purity of KNN is, however, a persistent challenge due to the volatility of alkali metal oxides, usually countered by using excess alkali metals in the precursor solutions. Here, we report on the development of two different aqueous precursor solutions for CSD of KNN films, and we demonstrate that the decomposition process during thermal processing of the films is of detrimental importance for promoting nucleation of KNN and suppressing the formation of secondary phases. Based on thermal analysis, X-ray diffraction and IR spectroscopy of films as well as powders prepared from the solutions, it was revealed that the decomposition temperature can be controlled by chemistry resulting in phase pure KNN films. A columnar microstructure with out-of-plane texturing was observed in the phase pure KNN films, demonstrating that the microstructure is directly coupled to the thermal processing of the films.

Lead Free Bi1/2Na1/2TiO3-CoFe2O4 Magnetoelectric Nanoparticulate Composite Thin Films Prepared by Chemical Solution Deposition Method

2018 ◽  
Vol 765 ◽  
pp. 30-33
Author(s):  
Vinod Kumar ◽  
Mintu Tyagi
Keyword(s):  
Thin Films ◽  
Chemical Solution Deposition ◽  
Ferroelectric Properties ◽  
Lead Free ◽  
Nanocomposite Films ◽  
Chemical Solution ◽  
Secondary Phases ◽  
Solution Deposition ◽  
Great Opportunity ◽  
Chemical Solution Deposition Method

Magnetoelectric (1−x) BNT−xCFO nanoparticulate thin films with (x= 0, 0.1, 0.2, 0.3) were fabricated by a chemical solution deposition technique. The X-ray diffraction shows that no other secondary phases are observed. Transmission electron microscope (TEM) revels that CFO nanoparticles were well distributed in matrix of BNT. The nanocomposite films exhibit both good magnetic and ferroelectric properties at room temperature (R-T), as well as enhanced magnetoelectric coupling. The composite withx= 0.2, showed the large value ofMEvoltage coefficient (αE) ~ 163 mV/cmOe. TheseMEcomposites provide a great opportunity as potential lead free systems forMEdevices.

Fabrication of β–BaB2O4 thin films with (00l) preferred orientation through the chemical solution deposition technique

2002 ◽  
Vol 17 (4) ◽  
pp. 844-851 ◽  
Author(s):  
Takeshi Kobayashi ◽  
Ryo Ogawa ◽  
Kun'ichi Miyazawa ◽  
Makoto Kuwabara
Keyword(s):  
Electron Microscopy ◽  
Film Thickness ◽  
Chemical Solution Deposition ◽  
Second Harmonic ◽  
Preferred Orientation ◽  
Chemical Solution ◽  
Deposition Technique ◽  
Solution Deposition ◽  
Rocking Curve ◽  
Degree Of Orientation

β–BaB2O4 (β-BBO) films with the (00l) preferred orientation were successfully fabricated on Si(100) and fused quartz substrates by the chemical solution deposition technique. The films were characterized by x-ray diffractometry in out-of-plane and in-plane geometry, reciprocal space mapping, transmission electron microscopy, and scanning electron microscopy. The degree of orientation of the films is as high as 95% and the full width at half-maximum (FWHM) of the rocking curve for the films is as low as 2.9°. The films have a mosaic structure. The (00l) planes of some of the crystallites tilt to the substrate and the in-plane orientation of each crystallite is random. The size of each crystallite is 0.5–1.5 μm, and crystallite thickness is equal to the film thickness. The degree of orientation of the films increases and the FWHM of rocking curve for the films decreases with increasing film thickness. The thicker the films are, the larger the crystallite size and the more definite the crystallite boundaries are. These phenomena are thought to be closely related with the increase in internal stress with film thickness. The films irradiated by Nd3+: YAG laser light generated second harmonic wave.

Leakage Current Reduction and Ferroelectric Property of BiFe1-xCoxO3 Thin Films Prepared by Chemical Solution Deposition Using Rapid Thermal Annealing

2009 ◽  
Vol 1199 ◽  
Author(s):  
TruongTho Nguyen ◽  
Takeshi Kanashima ◽  
Masanori Okuyama
Keyword(s):  
Thin Films ◽  
Leakage Current ◽  
Thermal Annealing ◽  
Rapid Thermal Annealing ◽  
Chemical Solution Deposition ◽  
Hysteresis Loops ◽  
Zero Field ◽  
Apparent Difference ◽  
Chemical Solution ◽  
Solution Deposition

AbstractFerroelectric Bi1.1Fe0.9Co0.1O3 (BFCO) thin films were prepared on Pt/TiO2/SiO2/Si substrates by chemical solution deposition method using rapid thermal annealing (RTA). The thickness of all BFCO thin films is about 100 nm. Although the BFCO prepared at 545°C has a large value of difference of polarization at zero field, 88 C/cm2, the P-E hysteresis loop of the BFCO thin film prepared at 520°C looks like more saturated and shows 47 C/cm2 of difference of polarization at zero field in the applied electric field of 2 MV/cm. The leakage current of the BFCO film annealed at 520°C, is about 2 × 10-2 A/cm2 at room temperature (RT). Moreover, it is also shown that the saturated possibility of P-E hysteresis loops and in 2 MV/cm their apparent difference of polarization at zero field depend on not only the leakage current but also scanning frequency used to measure BFCO thin films. Accordingly, the P-E hysteresis loops of BFCO thin films prepared from 520°C to 545°C seem to be saturated at high frequency from 10 KHz to 20 KHz when these samples are measured at RT.

scholarly journals Chemical Solution Deposition of La-Substituted BiFe0.5Sc0.5O3 Perovskite Thin Films on Different Substrates

Coatings ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 307
Author(s):  
Diana Griesiute ◽  
Dovydas Karoblis ◽  
Lina Mikoliunaite ◽  
Aleksej Zarkov ◽  
Andrei N. Salak ◽  
...  
Keyword(s):  
Thin Films ◽  
Chemical Solution Deposition ◽  
Cost Effective ◽  
Deposition Process ◽  
Stability Study ◽  
Fused Silica ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Optimal Annealing Temperature ◽  
Xrd Patterns

In the present work, polycrystalline Bi0.67La0.33Fe0.5Sc0.5O3 thin films were synthesized using a simple and cost-effective chemical solution deposition process employing the spin coating technique. In order to check the feasibility of the fabrication of thin films on various types of substrates, the films were deposited on Pt-coated silicon, silicon, sapphire, corundum, fused silica and glass. Based on the results of thermogravimetric analysis of precursor and thermal stability study, it was determined that the optimal annealing temperature for the formation of perovskite structure is 600 °C. It was observed that the relative intensity of the pseudocubic peaks (001)p and (011)p in the XRD patterns is influenced by the nature of substrates, suggesting that the formed crystallites have some preferred orientation. Roughness of the films was determined to be dependent on the nature of the substrate.

The effect of complexing agents in chemical solution deposition of metal chalcogenide thin films

2021 ◽  
Author(s):  
Sucheta Sengupta ◽  
Rinki Aggarwal ◽  
Yuval Golan
Keyword(s):  
Thin Films ◽  
Chemical Solution Deposition ◽  
Metal Ion ◽  
Chemical Deposition ◽  
Review Article ◽  
Complexing Agents ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Metal Chalcogenide ◽  
Chalcogenide Thin Films

This review article gives an overview of different complexing agents used during chemical deposition of metal chalcogenide thin films and their role in controlling the resultant morphology by effective complexation of the metal ion.

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