Modulated structures in (Bi,Pb)-Sr-Ca-Cu-O films

1990 ◽  
Vol 48 (4) ◽  
pp. 62-63
Author(s):  
Shozo Ikeda ◽  
Hirotoshi Hayakawa ◽  
Daniel R. Dietderich
Keyword(s):  
Rf Magnetron Sputtering ◽  
Potential Method ◽  
High Tc ◽  
Bscco System ◽  
Heat Treated ◽  
Modulated Structures ◽  
High Tc Phase ◽  
Deposited Films ◽  
Sputtering System

Pb addition makes easier to form the high Tc phase in the BSCCO system. However, Pb easily vaporized at high temperature. A controlled Pb potential method has been applied to grow the high Tc phase in films. Initially, films are deposited on cleaved MgO substrates using an rf magnetron sputtering system. These amorphous as-deposited films are heat treated in a sealed gold capsule along with a large pellet of Pb-added BSCCO. Details of the process and characterization of the films have been reported elsewhere (1). Films trated for 0.5h at 850° C contain mainly the low Tc phase with a small amount of the high Tc phase. Hawever, films treated for 3h at 850°C consist mainly of the high Tc phase. This film is superconductive with a Tc(zero) of 106K. The Pb/Bi ratio of the films, analysed by SEM- EDS, are 0.12 and 0.18 for heat tratment times of 0.5 and 3h, respectively. The present study investigates the modulated structures of these films using HREM.

scholarly journals Preparation and characterization of Bi-Po-Sr-Ca-Cu-O high-Tc phase thick films printed with superconductor paste.

1990 ◽  
Vol 37 (5) ◽  
pp. 688-691
Author(s):  
Yoshimitu Ogawa ◽  
Junichi Ishiai ◽  
Yutaka Mitsune ◽  
Yuzo Tasaki ◽  
Shuji Yoshizawa
Keyword(s):  
Thick Films ◽  
High Tc ◽  
High Tc Phase

Synthesis and Characterization of Carbon Nitride Thin Film with Evidence of Nanodomes

2004 ◽  
Vol 843 ◽  
Author(s):  
S. Chowdhury ◽  
M. T. Laugier
Keyword(s):  
Thin Film ◽  
Deposition Temperature ◽  
Carbon Nitride ◽  
Room Temperature ◽  
Electrical Characterization ◽  
Microstructural Characterization ◽  
Rf Magnetron Sputtering ◽  
Synthesis And Characterization ◽  
Sputtering System

ABSTRACTWe have reported the synthesis of carbon nitride thin films with evidence of formation of carbon nanodomes over a range of substrate temperature from 50 °C to 550 °C. An RF magnetron sputtering system was used for depositing carbon nitride films. The size of the nanodomes can be controlled by deposition temperature and increases from 40–80 nm at room temperature to 200–400 nm at high temperature (550 °C). Microstructural characterization was performed by AFM. Electrical characterization shows that these films have conductive behaviour with a resistivity depending on the size of the nanodomes. Resistivity values of 20 mΩ-cm were found for nanodomes of size 40–80 nm falling to 6 m?-cm for nanodomes of size 200–400 nm. Nanoindentation results show that the hardness and Young's modulus of these films are in the range from 9–22 GPa and 100–168 GPa respectively and these values decrease as the size of the nanodomes increases. GXRD results confirm that a crystalline graphitic carbon nitride structure has formed.

Synthesis and 17O NMR characterization of the high Tc phase in the BiPbSrCaCuO superconductor

1992 ◽  
Vol 82 (7) ◽  
pp. 547-550
Author(s):  
Nam H. Hur ◽  
Yong K. Park ◽  
Jong C. Park ◽  
Young H. Ko ◽  
Hee C. Lee
Keyword(s):  
17O Nmr ◽  
High Tc ◽  
Nmr Characterization ◽  
High Tc Phase

Superconducting Phases and Modulated Structures in (Bi, Pb)-Sr-Ca-Cu-O Wires

1989 ◽  
Vol 169 ◽  
Author(s):  
Y. Feng ◽  
R. E. Smallman ◽  
I. P. Jones ◽  
F. Wellhofer ◽  
N. Mcn. Alford ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Superconducting Properties ◽  
High Tc ◽  
Long Period ◽  
Superconducting Phases ◽  
Physical Measurements ◽  
Modulated Structures ◽  
High Tc Phase ◽  
Analytical Electron

Abstract(Bi, Pb)-Sr-Ca-Cu-O ‘2223’ wires with varying Bi/Pb ratios and sinter times have been investigated by parallel physical measurements and analytical electron microscopy. The numbers of phases present, their relative amounts, compositions and structures are reported and correlated with the superconducting properties. In particular, the recently reported long period (010) modulation (2b*/q*=7.7) is found to be connected with the “2223” high Tc phase.

Microstructural characterization of YBaCuO thin films deposited by rf magnetron sputtering as a function of annealing conditions

1991 ◽  
Vol 6 (2) ◽  
pp. 252-263 ◽  
Author(s):  
M. Ece ◽  
R.W. Vook ◽  
John P. Allen
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Buffer Layer ◽  
Microstructural Characterization ◽  
Rf Magnetron Sputtering ◽  
Flash Evaporation ◽  
Annealing Conditions ◽  
Deposited Films

Thin films of Y1Ba2Cu3O7−x have been prepared on MgO, SrTiO3/Al2O3, and Al2O3 substrates by rf magnetron sputtering. A buffer layer of SrTiO3 was deposited on Al2O3 by flash evaporation. The as-deposited films on MgO and SrTiO

scholarly journals Characterization of Pb-Bi-Sr-Ca-Cu-O high-Tc phase.

1988 ◽  
Vol 35 (9) ◽  
pp. 965-969 ◽  
Author(s):  
Yasunori Ikeda ◽  
Hiroyuki Ito ◽  
Zenji Hiroi ◽  
Mikio Takano ◽  
Hitoshi Kitaguchi ◽  
...  
Keyword(s):  
High Tc ◽  
High Tc Phase

scholarly journals Preparation and Characterization of FC Films Coated on PET Substrates by RF Magnetron Sputtering

2018 ◽  
Vol 142 ◽  
pp. 03008 ◽  
Author(s):  
Mei-lin Huang ◽  
Sheng-guo Lu ◽  
Wen-qin Du
Keyword(s):  
Magnetron Sputtering ◽  
Photoelectron Spectroscopy ◽  
Rf Magnetron Sputtering ◽  
X Ray ◽  
Coated Fabric ◽  
Coated Fabrics ◽  
Surface Morphologies ◽  
Deposited Films ◽  
Scanning Electron

Fluorocarbon (FC) films were prepared on polyethylene terephthalate (PET) plates and PET fabrics respectively by a radiofrequency (RF) magnetron sputtering technique using polytetrafluoroethylene (PTFE) as a target. Scanning electron microscope and X-ray photoelectron spectroscopy were used to investigate the morphology, structure and composition of the obtained FC films. The hydrophobicity and uvioresistant properties of the FC film coated fabric were studied. The results show that the FC films were successfully deposited on the PET substrates by a RF magnetron sputtering. The deposited films are made up of four components -CF3, -CF2-, CF- and -C-. The proportions of the four components and surface morphologies of the deposited films vary with the sputtering conditions. Compared with the original fabric samples, the hydrophobicity of the FC film coated fabrics is quite good and improved significantly.

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