scholarly journals Superconducting transition temperatures and lattice parameters of simple-cubic metastable Te--Au solid solutions containing Fe and Mn

1970 ◽  
Author(s):  
L. R. Newkirk ◽  
C. C. Tsuei
Keyword(s):  
Solid Solutions ◽  
Lattice Parameters ◽  
Transition Temperatures ◽  
Superconducting Transition ◽  
Simple Cubic ◽  
Fe And Mn

scholarly journals Fe-based superconducting transition temperature modeling by machine learning: A computer science method

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0255823
Author(s):  
Zhiyuan Hu
Keyword(s):  
Machine Learning ◽  
High Temperature ◽  
Transition Temperature ◽  
High Temperature Superconductors ◽  
Strong Relationship ◽  
Lattice Parameters ◽  
Transition Temperatures ◽  
Superconducting Transition ◽  
Temperature Modeling ◽  
High Transition

Searching for new high temperature superconductors has long been a key research issue. Fe-based superconductors attract researchers’ attention due to their high transition temperature, strong irreversibility field, and excellent crystallographic symmetry. By using doping methods and dopant levels, different types of new Fe-based superconductors are synthesized. The transition temperature is a key indicator to measure whether new superconductors are high temperature superconductors. However, the condition for measuring transition temperature are strict, and the measurement process is dangerous. There is a strong relationship between the lattice parameters and the transition temperature of Fe-based superconductors. To avoid the difficulties in measuring transition temperature, in this paper, we adopt a machine learning method to build a model based on the lattice parameters to predict the transition temperature of Fe-based superconductors. The model results are in accordance with available transition temperatures, showing 91.181% accuracy. Therefore, we can use the proposed model to predict unknown transition temperatures of Fe-based superconductors.

Cation Disordering in the Tl-2122 Superconductors

1989 ◽  
Vol 169 ◽  
Author(s):  
B. Morosin ◽  
D. S. Ginley ◽  
E. L. Venturini ◽  
R. J. Baughman ◽  
J. E. Schirber ◽  
...  
Keyword(s):  
Solid Solution ◽  
Structure Type ◽  
Lattice Parameters ◽  
Transition Temperatures ◽  
Superconducting Transition ◽  
Substantial Variation ◽  
Cation Disorder ◽  
Cation Disordering

AbstractWe have examined several crystals belonging to the Tl‐2122 structure type (Tl2CaBa2Cu2O8 with c=29Å), and have shown that cation solid solution occurs. Such cation disorder appears to be responsible for the observed small differences in lattice parameters reported by various investigators and to contribute towards the substantial variation in the superconducting transition temperatures.

Einfluß der Dotierung von BaPb0,75Bi0,25O3 mit K, Rb und Cs auf dessen supraleitende Eigenschaften

1991 ◽  
Vol 46 (1) ◽  
pp. 60-62 ◽  
Author(s):  
M. Jansen ◽  
J. Bredthauer
Keyword(s):  
Solid Solutions ◽  
Squid Magnetometer ◽  
Transition Temperatures ◽  
Superconducting Transition ◽  
X Ray ◽  
3 Dimensional ◽  
Dimensional Array ◽  
Nominal Stoichiometry

xIn the series with nominal stoichiometry Ba1-xAxPb0,75Bi0,25O3 (A = K, Rb with = 0.1, 0.2, 0.3, and A = Cs with x = 0.1) solid solutions were prepared. The composition of the samples obtained was verified by X -ray techniques. All compounds crystallize tetragonally with a 3-dimensional array of Pb(Bi) - O6 octahedra and Pb(Bi) -O -Pb(Bi) bonding angles of 180° (c-axis) and 165° (xK = 0.3) 168° (xRb = 0.3 and xCs = 0.1) within the a/b plane. Superconducting transition temperatures o f Ba1-xAxPb0,75Bi0,25O3 with Te = 12 (“onset”) were determined using a SQUID magnetometer.

A Systematic Study of the Effects of Metal Substitutions for Cu in Yba2(Cu1-XMX)3O7-δ, M=Fe, Co, Al, Ga, Cr, Ni, and Zn

1989 ◽  
Vol 169 ◽  
Author(s):  
Youwen Xu ◽  
A. R. Moodenbaugh ◽  
Y. L. Wang ◽  
M. Suenaga ◽  
R. L. Sabatini
Keyword(s):  
Solid Solution ◽  
Grain Size ◽  
Systematic Study ◽  
Lattice Parameters ◽  
Phase Solubility ◽  
Transition Temperatures ◽  
Superconducting Transition ◽  
Individual Grains ◽  
Ga Content

AbstractA series of polycrystalline YBa2(Cu1‐xMx)3O7‐δ (1:2:3) samples with a typical grain size > 10μm was prepared using well controlled and reproducible precedures. This relatively large grain size allowed microprobe studies of individual grains to determine M content of the 1:2:3 phase. Solubility limits of substitutions for Cu in these samples are estimated. Superconducting transition temperatures and lattice parameters are presented. In the case of Ga, microprobe studies show no evidence for Ga content of 1:2:3 above x=0.01. Preliminary studies show no evidence for solid solution above x=0.01 when substituting Mn, Cr, Zr, and Ti for Cu in 1:2:3.

Prediction of phonon-mediated superconductivity in two-dimensional Mo2B2

2019 ◽  
Vol 7 (9) ◽  
pp. 2589-2595 ◽  
Author(s):  
Luo Yan ◽  
Tao Bo ◽  
Peng-Fei Liu ◽  
Bao-Tian Wang ◽  
Yong-Guang Xiao ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Transition Temperatures ◽  
Superconducting Transition ◽  
Molybdenum Boride

We predict two new molybdenum boride monolayers as phonon-mediated superconductors with superconducting transition temperatures of 3.9 and 0.2 K.

scholarly journals Растворимость теллура в кристаллах TlGaTe-=SUB=-2-=/SUB=-, TlInTe-=SUB=-2-=/SUB=- и электрофизические свойства твердых растворов

2018 ◽  
Vol 60 (9) ◽  
pp. 1656
Author(s):  
А.И. Наджафов ◽  
Н.А. Алиева ◽  
К.Г. Халилова
Keyword(s):  
Phase Transition ◽  
Electrical Conductivity ◽  
Solid Solutions ◽  
Physicochemical Analysis ◽  
Lattice Parameters ◽  
Temperature Dependences ◽  
Complex Methods

AbstractThe complex methods of the physicochemical analysis are used to study TlGaTe_2–Te and TlInTe_2–Te alloys in which the tellurium solubility region up to 5.0 at % is observed. The temperature dependences of the lattice parameters and the electrical conductivity of TlGaTe_2 + x and TlInTe_2 + x have been studied in different crystallographic directions. The TlGaTe_2 + x and TlInTe_2 + x solid solutions undergo a phase transition at a temperature of 498 K. The transition nature is interpreted.

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