Influence of Sr substitution on the structure, charge distribution, and critical temperature ofY(Ba1−xSrx)2Cu4O8single crystals

2001 ◽  
Vol 64 (9) ◽  
Author(s):  
J. Karpinski ◽  
S. M. Kazakov ◽  
M. Angst ◽  
A. Mironov ◽  
M. Mali ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Charge Distribution

Pressure-induced charge distribution effect on superconducting critical temperature of HgBa2Ca2Cu3O8+δ

2000 ◽  
Vol 341-348 ◽  
pp. 275-276 ◽  
Author(s):  
H.M. Shao ◽  
S.A. Aruna ◽  
C.J. Wang ◽  
M.S. Zhuo ◽  
X.L. Sun ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Charge Distribution ◽  
Distribution Effect ◽  
Induced Charge

SCALING BEHAVIOR FOR RESISTANCE TRANSITION IN Hg-1223 SUPERCONDUCTOR UNDER PRESSURE

2008 ◽  
Vol 22 (05) ◽  
pp. 539-546 ◽  
Author(s):  
S. L. LIU ◽  
H. M. SHAO ◽  
C. Y. HAN
Keyword(s):  
High Pressure ◽  
Critical Temperature ◽  
Temperature Dependence ◽  
Charge Distribution ◽  
Pressure Dependence ◽  
Scaling Behavior ◽  
Scaling Parameter ◽  
Charge Model ◽  
Sheet Charge ◽  
Relative Change

The effects of high pressure on the temperature dependence of the resistance transition of Hg -1223 superconductor are measured up to 7.8 GPa. At a pressure lower than 5.4 GPa, Tc increases from 130 K to a maximal value of 140 K with a rate of 1.85 K/GPa. At higher pressure, Tc begins to decrease. This pressure dependence of critical temperature can be explained with the sheet charge model, which introduces the inhomogeneous charge distribution in the inner and outer CuO 2 layer(s). The temperature dependence of the resistance under various pressure can be scaled onto a single curve with P=0ρ(T)=Pρ(aT), where the scaling parameter a is estimated to be smaller than 1. Further, the scaling parameter a reflects the relative change of the anisotropy factor γ.

Study of charge transfer in FeTi

1983 ◽  
Vol 41 ◽  
pp. 296-297
Author(s):  
J. Taft∅
Keyword(s):  
Charge Transfer ◽  
Charge Distribution ◽  
Electron Scattering ◽  
Periodic System ◽  
Electron Distribution ◽  
Scattering Amplitude ◽  
Transition Elements ◽  
Hartree Fock ◽  
Cscl Structure ◽  
The Right

It is well known that for reflections corresponding to large interplanar spacings (i.e., sin θ/λ small), the electron scattering amplitude, f, is sensitive to the ionicity and to the charge distribution around the atoms. We have used this in order to obtain information about the charge distribution in FeTi, which is a candidate for storage of hydrogen. Our goal is to study the changes in electron distribution in the presence of hydrogen, and also the ionicity of hydrogen in metals, but so far our study has been limited to pure FeTi. FeTi has the CsCl structure and thus Fe and Ti scatter with a phase difference of π into the 100-ref lections. Because Fe (Z = 26) is higher in the periodic system than Ti (Z = 22), an immediate “guess” would be that Fe has a larger scattering amplitude than Ti. However, relativistic Hartree-Fock calculations show that the opposite is the case for the 100-reflection. An explanation for this may be sought in the stronger localization of the d-electrons of the first row transition elements when moving to the right in the periodic table. The tabulated difference between fTi (100) and ffe (100) is small, however, and based on the values of the scattering amplitude for isolated atoms, the kinematical intensity of the 100-reflection is only 5.10-4 of the intensity of the 200-reflection.

Charge distribution on dust particles of space plasma

2003 ◽  
Vol 9 (4) ◽  
pp. 67-72 ◽  
Author(s):  
Yu.O. Klymenko ◽  
◽  
О.К. Cheremnykh ◽  
Keyword(s):  
Charge Distribution ◽  
Space Plasma ◽  
Dust Particles

Space Charge Distribution Measurement in FEP Film Irradiated by Proton

2020 ◽  
Vol 140 (10) ◽  
pp. 504-505
Author(s):  
Kaisei Enoki ◽  
Ushio Chiba ◽  
Hiroaki Miyake ◽  
Yasuhiro Tanaka
Keyword(s):  
Space Charge ◽  
Charge Distribution ◽  
Distribution Measurement ◽  
Space Charge Distribution

Optical properties of the Vanadium dioxide

2015 ◽  
Vol 8 (2) ◽  
pp. 2148-2155 ◽  
Author(s):  
Abderrahim Benchaib ◽  
Abdesselam Mdaa ◽  
Izeddine Zorkani ◽  
Anouar Jorio
Keyword(s):  
Energy Efficiency ◽  
Optical Properties ◽  
Critical Temperature ◽  
Thin Layer ◽  
Dielectric Function ◽  
Vanadium Dioxide ◽  
Ultra Violet ◽  
Index Of Refraction ◽  
Practical Utility ◽  
Infra Red

The vanadium dioxide is a material thermo chromium which sees its optical properties changing at the time of the transition from the phase of semiconductor state ↔ metal, at a critical temperature of 68°C. The study of the optical properties of a thin layer of VO₂ thickness 82 nm, such as the dielectric function, the index of refraction, the coefficient ofextinction, the absorption’s coefficient, the reflectivity, the transmittivity, in the photonic spectrum of energy ω located inthe interval: 0.001242 ≤ ω (ev) ≤ 6, enables us to control well its practical utility in various applications, like the intelligentpanes, the photovoltaic, paintings for increasing energy efficiency in buildings, detectors of infra-red (I.R) or ultra-violet(U.V). We will make simulations with Maple and compare our results with those of the literature

ALLEGHENY STAINLESS TYPE 405

Alloy Digest ◽  
1985 ◽  
Vol 34 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Critical Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Ductile Material ◽  
Air Cooling ◽  
Temperature Performance

Abstract ALLEGHENY STAINLESS Type 405, unlike most other 12% chromium steels, is not subject to appreciable hardening through air cooling from high temperatures. This is an advantageous characteristic in those applications where a soft, ductile material is required after rapid cooling from above the critical temperature. The nonhardening tendency of Type 405 also retards the formation of hardening cracks where welding is employed. Its uses include annealing boxes and baffles where hardening during cooling would be undesirable. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as heat treating and machining. Filing Code: SS-461. Producer or source: Allegheny Ludlum Corporation.

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