scholarly journals Study Effect of annealing Temperature on enhancement of High-Tc Phase for BiPbSrCaCuZnO thin film through thermal expantion

2019 ◽  
Vol 29 (4) ◽  
pp. 138
Author(s):  
Suzan Malek ◽  
Suzan Malek Shakouli
Keyword(s):  
Thin Film ◽  
Critical Temperature ◽  
Annealing Temperature ◽  
High Tc ◽  
High Tc Phase ◽  
Critical Temperature Tc

Annealing thermal plays an important role on the formation of high Tc-phase BiPbSrCaCuZnO through expansion and contraction layers which be associated with formation high and low phases respectively, The prepared samples composition BiPbSrCaCuZnO have been annealed at (820,840,860,880) C°. It is observed the critical temperature Tc increase for films which annealed at (820,840,880) C°while Tc decreases at Ta =860 C°.

Synthesis and study the Structural and electrical and mechanical properties of High Temperature Superconductor Tl0.5Pb0.5Ba2Can-1Cun-xNixO2n+3-δ Substituted with nickel oxide for n=3

2018 ◽  
Vol 31 (3) ◽  
pp. 26 ◽  
Author(s):  
Laheeb. A. Mohammed ◽  
Kareem. A. Jasim
Keyword(s):  
Nickel Oxide ◽  
High Temperature Superconductor ◽  
Sintering Temperature ◽  
Concentration Effects ◽  
High Tc ◽  
Xrd Diffraction ◽  
Ni Content ◽  
High Tc Phase ◽  
Pure Phases ◽  
Critical Temperature Tc

   on this research is to study the effect of nickel oxide substitution on the pure phases superconductor Tl0.5Pb0.5Ba2Can-1Cun-xNixO2n+3-δ (n=3) where x=(0,0.2,0.4,0.6,0.8.and 1.0). The specimens in this work were prepared with used  procedure of solid state reaction with sintering temperature 8500C for 24 h .we used technical (4-prob)to calculated and the critical temperature Tc . The results of the XRD diffraction analysis showed that the structure for pure and doped phases was tetragonal with phases high-Tc phase (1223),(1212) and low-Tc phase (1202)  and add to the presence of some impure phase. It was noted the value a=b,c  the parameter of  the lattice increment  with the increment of Ni content. The increment of (NiO) concentration effects electrical resistivity, dielectric constant and the hardness.

scholarly journals A comparative study of enhancements of critical temperature in Bi-Pb-Sr-Ca-Cu-O superconductors

2017 ◽  
Vol 33 (3) ◽  
Author(s):  
Duc Tran ◽  
Nhan Thi Thanh Duong ◽  
Tien Minh Le ◽  
Duong Phuc Nguyen ◽  
Man Khac Nguyen
Keyword(s):  
Critical Temperature ◽  
Volume Fraction ◽  
X Ray Diffraction ◽  
Residual Resistance ◽  
High Tc ◽  
Preparation Conditions ◽  
Average Size ◽  
Experimental Findings ◽  
Critical Temperature Tc ◽  
Electronic Microscope

In this work, the effects of sintering temperature and Na subtitution on zero critical temperature (Tc,0) in Bi-Pb-Sr-Ca-Cu-O superconductors were investigated. The Bi1.6Pb0.4Sr2Ca2-xNaxCu3O10+d bulk samples with x = 0.00 and 0.05 (BPSCCO) were prepared by using the solid state reaction technique at elevated sintering temperatures of 840 and 850oC. To examine the improvements of structural and superconducting properties of the BPSCCO samples, the X-ray diffraction (XRD), scanning electronic microscope (SEM) and DC resistance versus temperature (R-T) measurements were carried out. The experimental findings exhibit a co-existence of the high Tc (Bi-2223) and low Tc (Bi-2212) phases in all samples. The estimated volume fraction of the Bi-2223 phase was increased from 71.4 to 75.7%, and the average size of the Bi-2223 grains was enlarged from 4.5 to 9.8 mm as changing the sample preparation conditions. The improved connectivities between the Bi-2223 grains were also obtained by quantitively analyzing the relation between Tc,0 and residual resistance ratio (RRR). These improvements were likely to be reasons for the enhancements of Tc,0 in the BPSCCO samples.

A study of magnetoresistive transition in high-Tc phase Bi-Pb-Sr-Ca-Cu-O thin film.

1990 ◽  
Vol 165-166 ◽  
pp. 1355-1356 ◽  
Author(s):  
Ahmed A.A. Youssef ◽  
Takashi Fukami ◽  
Yuuji Horie ◽  
Shoichi Mase
Keyword(s):  
Thin Film ◽  
High Tc ◽  
High Tc Phase

Thin Film Processing for High-Tc Superconductors of Bi-System

1989 ◽  
Vol 169 ◽  
Author(s):  
K. Wasa ◽  
H. Adachi ◽  
K. Hirochi ◽  
Y. Ichikawa ◽  
K. Setsune
Keyword(s):  
Thin Film ◽  
Atomic Layer ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Layer By Layer ◽  
High Tc Superconductors ◽  
High Tc ◽  
Superconducting Phases ◽  
High Tc Phase ◽  
Deposition Processes

AbstractBasic thin film deposition processes for the high-Tc superconductors of Bi-systems are described. There appear several superconducting phases including the low-Tc phase Bi2Sr2Ca1 Cu2Ox and the high-Tc phase Bi2Sr2Ca2Cu3Ox. Thin films with these superconducting phases are synthesized by a selection of the substrate temperature Ts during the deposition : the high-Tc phase with Tc=100K is synthesized at Ts>800 °C; the low-Tc phase with Tc=80K, at Ts<600°C. However, these films often comprise show structure comprizing the different superconducting phases.The close control of the superconducting phase has been achieved by the layer-by-layer deposition in the atomic layer epitaxy process.

Anomalous Hall effect in C-oriented high-Tc phase BiPbSrCaCuO thin film

1991 ◽  
Vol 178 (4-6) ◽  
pp. 287-295 ◽  
Author(s):  
Yu-he Wang ◽  
Lin Li ◽  
Bing Li ◽  
Ye-ye He ◽  
Qing-hui Mong
Keyword(s):  
Thin Film ◽  
Hall Effect ◽  
Anomalous Hall Effect ◽  
High Tc ◽  
High Tc Phase

Sputtering synthesis of as-grown superconducting BiSrCaCuO thin film with single high-Tc phase

1990 ◽  
Vol 165-166 ◽  
pp. 1481-1482 ◽  
Author(s):  
Hiroshi Yamamoto ◽  
Manabu Katoh ◽  
Kenji Satoh ◽  
Toshiyuki Nakamura ◽  
Masaichi Tanaka
Keyword(s):  
Thin Film ◽  
High Tc ◽  
High Tc Phase

scholarly journals Towards Room-Temperature Superconductivity

2020 ◽  
Author(s):  
Jacob Szeftel ◽  
Nicolas Sandeau ◽  
Michel Abou Ghantous ◽  
Muhammad El Saba
Keyword(s):  
Critical Temperature ◽  
Band Structure ◽  
Electron Concentration ◽  
Stability Criterion ◽  
Room Temperature ◽  
High Tc ◽  
Electron Band ◽  
Room Temperature Superconductivity ◽  
Critical Temperature Tc ◽  
Electron Band Structure

By taking advantage of a stability criterion established recently, the critical temperature Tc is reckoned with help of the microscopic parameters, characterising the normal and superconducting electrons, namely the independent-electron band structure and a repulsive two-electron force. The emphasis is laid on the sharp Tc dependence upon electron concentration and inter-electron coupling, which might offer a practical route toward higher Tc values and help to understand why high-Tc compounds exhibit such remarkable properties.

Preparation of Bi(Pb)SrCaCuO Thin Film with High-Tc Phase

1990 ◽  
pp. 565-572
Author(s):  
Tsutom Yotsuya ◽  
Yoshihiko Suzuki ◽  
Soichi Ogawa ◽  
Hirofumi Imokawa ◽  
Masahiro Yoshikawa ◽  
...  
Keyword(s):  
Thin Film ◽  
High Tc ◽  
High Tc Phase

scholarly journals Towards Room-Temperature Superconductivity

2021 ◽  
Author(s):  
Jacob Szeftel ◽  
Nicolas Sandeau ◽  
Michel Abou Ghantous ◽  
Muhammad El Saba
Keyword(s):  
Critical Temperature ◽  
Band Structure ◽  
Electron Concentration ◽  
Stability Criterion ◽  
Room Temperature ◽  
High Tc ◽  
Electron Band ◽  
Room Temperature Superconductivity ◽  
Critical Temperature Tc ◽  
Electron Band Structure

By taking advantage of a stability criterion established recently, the critical temperature Tc is reckoned with help of the microscopic parameters, characterising the normal and superconducting electrons, namely the independent-electron band structure and a repulsive two-electron force. The emphasis is laid on the sharp Tc dependence upon electron concentration and inter-electron coupling, which might offer a practical route toward higher Tc values and help to understand why high-Tc compounds exhibit such remarkable properties.

scholarly journals Effect of repeated annealing on the synthetic and electrical properties of Bi2-(x+y)PbxAgy Sr2Ca2Cu3O10+δ electrically superconductor

2019 ◽  
Vol 24 (4) ◽  
pp. 57
Author(s):  
Khalid Hamdi Razzeg ◽  
Abdul Kareem Dahas Ali ◽  
, Chanar Abiden Zaynel
Keyword(s):  
Critical Temperature ◽  
Electrical Properties ◽  
Annealing Temperature ◽  
Annealing Process ◽  
Partial Substitution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Know How ◽  
Substitution Ratio ◽  
Critical Temperature Tc

This research involved the preparation of Bi2-(x+y)PbxAgy Sr2Ca2Cu3O10+δ with different concentrations of (x,y) which are (x=y=0)(x=0.05,y=0.15)(x=y=0.1)(x=0.15,y=0.05) by the method of solid state reaction under hydrostatic pressure of 8 ton /cm2  and at annealing temperature of 1123K in presence of sufficient amount of oxygen. In order to obtain an increase in the regularity of crystalline composite and also to obtain the best critical temperature, the annealing was repeated on these samples at 723K. After X-ray diffraction (XRD) test to know how effective the partial substitution and repeated annealing is, it was obvious that the crystalline composite was of tetragonal type and the best substitution ratio is when (x=0.05,y=0.15) where the values of lattice dimensions were a=b=5.4056°A, c=37.4226°A, after repeating the annealing process on these samples ,the crystalline composite kept its type and with conspicuous increase in the length of c-axis, but the best sample after repeating the annealing was at ratio of (x=y=0.1) where the values of lattice dimensions became a=b=5.4030°A,c=37.5230°A when it was a=b=5.4011°A,c=37.0660°A before repeating the annealing .When the electrical properties of these samples was studied ,we noticed that the oxygen has an important role in increasing the critical temperature and we obtained the best critical temperature Tc=144K and that’s when x=0.05,y=0.15 while after repeating the annealing it was Tc=146K and that’s when x=y=0.1 and it was Tc=136K before repeating the annealin   http://dx.doi.org/10.25130/tjps.24.2019.073  

Sign in / Sign up

Export Citation Format

Share Document