Symmetry, density of doping holes, andTcin superconducting thallium cuprates

1994 ◽  
Vol 49 (14) ◽  
pp. 9906-9914 ◽  
Author(s):  
N. Merrien ◽  
L. Coudrier ◽  
C. Martin ◽  
A. Maignan ◽  
F. Studer ◽  
...  
Keyword(s):  
Thallium Cuprates

In defense of the bromine method for the determination of hole concentration in superconducting thallium cuprates

1992 ◽  
Vol 96 (2) ◽  
pp. 468-469 ◽  
Author(s):  
J. Gopalakrishnan ◽  
R. Vijayaraghavan ◽  
R. Nagarajan ◽  
C. Shivakumara
Keyword(s):  
Hole Concentration ◽  
Thallium Cuprates

Extended Defects and Redox Mechanisms in Thallium Cuprates

2020 ◽  
pp. 41-88
Author(s):  
Bernard Raveau ◽  
Maryvonne Hervieu ◽  
Claude Michel
Keyword(s):  
Extended Defects ◽  
Thallium Cuprates

Systematic thermopower measurements of the thallium cuprates Tl(Ba,Sr)2Cam−1CumO2m+3−δ and Tl2Ba2Cam−1CumO2m+4+δ

1995 ◽  
Vol 250 (3-4) ◽  
pp. 235-239 ◽  
Author(s):  
C. Martin ◽  
J. Hejtmanek ◽  
Ch. Simon ◽  
A. Maignan ◽  
B. Raveau
Keyword(s):  
Thallium Cuprates

Flux pinning and critical currents in superconducting thallium cuprates

Cryogenics ◽  
1993 ◽  
Vol 33 (5) ◽  
pp. 502-505 ◽  
Author(s):  
M.R. Presland ◽  
J.L. Tallon ◽  
N.E. Flower ◽  
R.G. Buckley ◽  
A. Mawdsley ◽  
...  
Keyword(s):  
Flux Pinning ◽  
Critical Currents ◽  
Thallium Cuprates

Magnetic Alignment of Bi and T1 Cuprates Containing Rare Earth Elements (II)

1989 ◽  
Vol 169 ◽  
Author(s):  
Feng Chen ◽  
Robert S. Markiewicz ◽  
Bill C. Giessen
Keyword(s):  
Magnetic Field ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Basal Plane ◽  
Magnetic Alignment ◽  
Thallium Cuprates ◽  
Bismuth Cuprates ◽  
Tl Cuprates

AbstractContinuing an earlier study, we report new data on the orientational effects of magnetic field alignment of some bismuth cuprates and 8 additional thallium cuprates. Strong parallel alignment is seen for Lu bismate and Nd, Sm and Ho thallate; strong normal alignment is seen for Tm; however, in contrast to bismates and 123 phase, Tl cuprates show little anisotropy among directions within the basal plane.

TlBa2NdCu2O7 AND TlBa2YCu2O7 TWO NON-SUPERCONDUCTIVE OXIDES WITH THE “1212” STRUCTURE

1989 ◽  
Vol 03 (01) ◽  
pp. 93-99 ◽  
Author(s):  
C. MARTIN ◽  
D. BOURGAULT ◽  
C. MICHEL ◽  
M. HERVIEU ◽  
B. RAVEAU
Keyword(s):  
Diffraction Study ◽  
Powder Diffraction ◽  
Rock Salt ◽  
Close Relationships ◽  
Double Perovskite ◽  
X Ray ◽  
Thallium Cuprates ◽  
Significant Difference ◽  
Oxygen Atoms

Two new thallium cuprates isostructural with the “1212” superconductors were synthesized. These materials do not exhibit any superconductivity in spite of the presence of Tl(III), contrary to the oxides such as Tl 2 Ba 2 CaCu 2 O 8 or Tl 2 Ba 2 Ca 2 Cu 3 O 10. Their X-ray powder diffraction study confirms their close relationships with the superconductor TlBa 2 CaCu 2 O 7, i.e., their structure is built up from distorted double rock salt-type layers [(TIO) (BaO)] intergrown with oxygen deficient double perovskite layers [ BaY ( CuO 2.5)2] or [ BaNd ( CuO 2.5)2]. Although the determination of the positions of the oxygen atoms cannot be considered as accurate, one significant difference with respect to TlBa 2 CaCu 2 O 7 must be pointed out: the oxygen atoms forming the basal planes of the CuO 5 pyramids are brought closer together along c, leading to an almost cubic environment for Y and Nd, whereas the CaO 8 prisms are elongated along c in the thallium superconductors.

Stabilization of new superconducting thallium cuprates and oxycarbonates by molybdenum

1995 ◽  
Vol 254 (1-2) ◽  
pp. 33-43 ◽  
Author(s):  
F. Letouzé ◽  
C. Martin ◽  
A. Maignan ◽  
C. Michel ◽  
M. Hervieu ◽  
...  
Keyword(s):  
Thallium Cuprates
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