Doping influence on Sm1 − x Th x OFeAs superconducting properties: Observation of the effect of intrinsic multiple Andreev reflections and determination of the superconducting parameters

JETP Letters ◽  
2014 ◽  
Vol 99 (3) ◽  
pp. 136-145 ◽  
Author(s):  
T. E. Kuzmicheva ◽  
S. A. Kuzmichev ◽  
N. D. Zhigadlo
Keyword(s):  
Superconducting Properties ◽  
Superconducting Parameters ◽  
Multiple Andreev Reflections

Pseudopotential Calculations of Structural Properties of Solids

1985 ◽  
Vol 63 ◽  
Author(s):  
Marvin L. Cohen
Keyword(s):  
Phase Transitions ◽  
Structural Phase ◽  
Vibrational Properties ◽  
Structural Phase Transitions ◽  
Superconducting Properties ◽  
Lattice Constants ◽  
Pseudopotential Calculations ◽  
Pseudopotential Approach ◽  
Cohesive Energies

ABSTRACTThrough the development of a total energy pseudopotential approach, it has become possible to compute structural, electronic, and vibrational properties of solids using only the atomic numbers and atomic masses of the constituent atoms as input. The method has been applied to semiconductors, insulators, and metals; and agreement with experiment for most properties is usually within a few percent.Applications include the determination of lattice constants for specific structural phases, properties of structural phase transitions, cohesive energies, bulk moduli, lattice vibrational spectra, electron-lattice interaction parameters, and electronic and superconducting properties. A recent example is the prediction of superconductivity in highly condensed hexagonal silicon which was subsequently found experimentally.

AC losses and determination of some superconducting parameters of Ag2O added Bi2223 superconductors

2006 ◽  
Vol 436 (2) ◽  
pp. 93-98 ◽  
Author(s):  
İ. Düzgün ◽  
İ. Karaca ◽  
A. Öztürk ◽  
S. Çelebi
Keyword(s):  
Ac Losses ◽  
Superconducting Parameters

scholarly journals Experimental determination of superconducting parameters for the intermetallic perovskite superconductorMgCNi3

2003 ◽  
Vol 67 (9) ◽  
Author(s):  
Z. Q. Mao ◽  
M. M. Rosario ◽  
K. D. Nelson ◽  
K. Wu ◽  
I. G. Deac ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Superconducting Parameters

Synthesis of MgB2 from Anhydrous B2O3 by Ball Milling Method and Determination of Superconductivity Properties

2007 ◽  
Vol 336-338 ◽  
pp. 723-725 ◽  
Author(s):  
Metin Gürü ◽  
Yüksel Akyüz ◽  
Süleyman Tekeli
Keyword(s):  
Superconducting Transition ◽  
Superconducting Properties ◽  
Vacuum Oven ◽  
Synthesis Time ◽  
Argon Gas ◽  
Oxide Powders ◽  
Gas Atmosphere ◽  
Milling Method ◽  
Points Of View

The discovery of superconductivity at 39 K in magnesium diboride (MgB2) has attracted much attention from theoretical and experimental points of view because it has the highest superconducting transition temperature in the conventional intermetallic superconductors reported so far. After the discovery of superconductivity in MgB2, many attempts have been made to synthesize this material with an aim of improving superconducting properties. In this study, MgB2 was synthesized from anhydrous B2O3. To provide homogeneous mixing of magnesium and boron oxide powders and to make easy sintering, powders were mechanically milled in an attritor under argon gas atmosphere. The mixture was treated with ethylenediamine solution to separete MgB2 from the product. The suspension solution was filtrated under vacuum and the solid particulates of MgO were removed. The filtrate was evaporated in a vacuum oven at 80 °C and sintered at 900 °C for 2 h under flowing argon gas atmosphere. XRD results showed that the final product was MgB2 with a small amount of MgO. Mechanical milling decreased the synthesis time and temperature of MgB2. The critical temperature of the specimens was determined as 37.4 K by an A.C susceptometer.

Determination of irreversibility fields and superconducting parameters inBaPb0.75Bi0.25O3

2000 ◽  
Vol 61 (21) ◽  
pp. 14804-14809 ◽  
Author(s):  
D. N. Zheng ◽  
Z. X. Zhao ◽  
A. M. Campbell
Keyword(s):  
Irreversibility Fields ◽  
Superconducting Parameters
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