scholarly journals High-Pressure Synthesis and Superconducting Properties of NaCl-Type In1−xPbxTe (x = 0–0.8)

2020 ◽  
Vol 5 (1) ◽  
pp. 14 ◽  
Author(s):  
Masayoshi Katsuno ◽  
Rajveer Jha ◽  
Kazuhisa Hoshi ◽  
Ryota Sogabe ◽  
Yosuke Goto ◽  
...  
Keyword(s):  
High Pressure ◽  
Weak Coupling ◽  
Substitution Effect ◽  
Lattice Parameter ◽  
Superconducting Transition ◽  
Superconducting Properties ◽  
High Pressure Synthesis ◽  
Bulk Superconductivity ◽  
Pressure Synthesis ◽  
Pb Substitution

We have investigated the Pb-substitution effect upon the superconductivity of NaCl-type In1−xPbxTe. Polycrystalline samples with x = 0–0.8 were synthesized using high-pressure synthesis. The lattice parameter was systematically increased by Pb substitution. For x ≤ 0.6, bulk superconductivity was observed, and the superconducting transition temperature increased from 3 K (for InTe) to 5 K by Pb substitutions. From analyses of specific heat jumps at the superconducting transition, conventional (phonon-mediated) weak-coupling pairing mechanisms were suggested for In1−xPbxTe.

scholarly journals Enhancement of an Iron-Based Layered Compound Superconducting Properties by High Pressure Synthesis Technique

2008 ◽  
Vol 77 (Suppl.C) ◽  
pp. 40-43 ◽  
Author(s):  
Parasharam M. Shirage ◽  
Kiichi Miyazawa ◽  
Hijiri Kito ◽  
Hiroshi Eisaki ◽  
Akira Iyo
Keyword(s):  
High Pressure ◽  
Layered Compound ◽  
Superconducting Properties ◽  
High Pressure Synthesis ◽  
Synthesis Technique ◽  
Pressure Synthesis ◽  
Iron Based

High-pressure synthesis and superconducting properties of the oxychloride superconductor(Sr,Ca)3Cu2O4+δCl2−y

2000 ◽  
Vol 61 (1) ◽  
pp. 778-783 ◽  
Author(s):  
C.-Q. Jin ◽  
R. Puzniak ◽  
Z.-X. Zhao ◽  
X.-J. Wu ◽  
T. Tatsuski ◽  
...  
Keyword(s):  
High Pressure ◽  
Superconducting Properties ◽  
High Pressure Synthesis ◽  
Pressure Synthesis

HIGH PRESSURE SYNTHESIS AND STRUCTURAL STUDIES ON (Ca0.3Sr0.7)0.9Cu1-xZnxO2 (0≤ x ≤0.3)

1999 ◽  
Vol 13 (03n04) ◽  
pp. 119-124
Author(s):  
C. VENKATESWARAN ◽  
K. ANBUKUMARAN ◽  
N. VICTOR JAYA ◽  
S. NATARAJAN
Keyword(s):  
High Pressure ◽  
Zinc Concentration ◽  
Structural Phase ◽  
Structural Studies ◽  
Superconducting Transition ◽  
High Pressure Synthesis ◽  
Tetragonal System ◽  
Phase Compound ◽  
Pressure Synthesis ◽  
Pressure Phase

High pressure synthesis and structural studies on the reported high pressure phase compound ( Ca 0.3 Sr 0.7)0.9 CuO 2 have been carried out using zinc. Substitution of zinc seriously affects the superconducting transition temperature T c , which gets lowered to around 60 K for the x=0.1 compound. Further increase in zinc concentration destroys superconductivity. All the compounds could be well indexed to the tetragonal system with little variation in lattice parameters showing structural phase stability.

High-pressure synthesis and superconducting properties of Sr2(Ca1−xSrx)Cu2Oy(x= 0–0.75)

2016 ◽  
Vol 55 (2S) ◽  
pp. 02BC16
Author(s):  
Satoshi Shinoda ◽  
Tomoya Aoba ◽  
Tsuneo Suzuki ◽  
Tadachika Nakayama ◽  
Hisayuki Suematsu ◽  
...  
Keyword(s):  
High Pressure ◽  
Superconducting Properties ◽  
High Pressure Synthesis ◽  
Pressure Synthesis

Erratum: “High-pressure synthesis and superconducting properties of Sr2(Ca1− x Sr x )Cu2O y (x = 0–0.75)”

2016 ◽  
Vol 56 (1) ◽  
pp. 019201 ◽  
Author(s):  
Satoshi Shinoda ◽  
Tomoya Aoba ◽  
Tsuneo Suzuki ◽  
Tadachika Nakayama ◽  
Hisayuki Suematsu ◽  
...  
Keyword(s):  
High Pressure ◽  
Superconducting Properties ◽  
High Pressure Synthesis ◽  
Pressure Synthesis

High-Pressure Synthesis of Novel Hydride in Ca-TM Systems

2007 ◽  
Vol 26-28 ◽  
pp. 885-888 ◽  
Author(s):  
Y. Yambe ◽  
R. Kataoka ◽  
D. Kyoi ◽  
Atsunori Kamegawa ◽  
Hitoshi Takamura ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Applied Pressure ◽  
Lattice Parameter ◽  
The Novel ◽  
Hydrogen Storage Materials ◽  
High Pressure Synthesis ◽  
Unknown Phase ◽  
Pressure Synthesis ◽  
Fcc Structure

Hydrogen storage materials are attracting much attention as media of storing hydrogen. High-pressure synthesis has been widely used for exploration of novel materials. We have reported that many new Mg-based hydrides or alloys have been synthesized by anvil-type apparatus under the pressure of GPa-order. In Mg - TM ( TM = Nb, Ta ) - H systems, it was reported that novel FCC-type hydride which is similar in crystal structure and composition to Mg7TiH13-16 was synthesized under 8 GPa. On the other hand, there is few reports of novel Ca-based hydrides to be synthesized under high pressure. However, the compressibility of calcium is higher than that of magnesium. Thus, there is a tendency for Ca compounds to be synthesized by lower pressure than Mg ones. This study describes the synthesis of new Ca-based hydrides by this high-pressure techniques. In Ca - TM ( TM = Ti, Hf, V, Nb and Ta ) systems, the influence of applied pressure on present phases were investigated. For the composition of CaH2 - 14.3 mol%ZrH2 in Ca - Zr - H system, novel hydride was synthesized at 1073 K for 2 h under 5 GPa. Crystal structure of the novel hydride was found to be FCC-type with a lattice parameter of a = 0.531 nm. In addition, the thermal stability and hydrogen contents of this novel hydride were investigated. In Ca - Hf - H system, the unknown phase was observed in the sample of CaH2 - 12.5 mol%HfH2 prepared 1073 K for 2 h under 5 GPa. This unknown phase is FCC structure with lattice parameter of a = 0.528(2) nm.

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