Journal ArticleDOI
GeV-heavy ion irradiation effects in thallium-based superconducting copper oxides
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In this article, Tl-based superconducting copper oxides were irradiated at 140 K by 3.6 GeV Xe ions and the resistance measured in situ as a function of the fluence.Abstract:
Tl-based superconducting copper oxides Tl 2 Ba 2 CaCu 2 O 8 , TlBa 2 Ca 2 Cu 3 O 9 and Tl 2 Ba 2 Ca 2 Cu 3 O 10 were irradiated at 140 K by 3.6 GeV Xe ions and the resistance measured in situ as a function of the fluence. The results confirm that electronic stopping of GeV heavy ions plays a major role in the defect creation mechanism. Critical current densities were obtained from magnetization measurements on samples irradiated by 5.8 GeV Xe ions at fluences up to 2x10 12 cm -2 and magnetic field orientations parallel and normal to the heavy ions tracks. Large enhancements of flux pinning and J c are observed, in particular at low fluences, without significant change of the T c 's.read more
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Magneto-optical studies of current distributions in high-Tc superconductors
TL;DR: In this paper, a review of the magneto-optical imaging technique and experiments on thin films, single crystals, polycrystalline bulk ceramics, tapes and melt-textured HTS materials is presented.
Journal ArticleDOI
Vortex pinning and creep in high-temperature superconductors with columnar defects
TL;DR: In this article, the influence of the angular dispersion (splay) of the tracks on vortex pinning and creep is discussed, and measurements of the temperature, field and defect density dependence of the persistent currents and their time relaxation in YBCO are presented.
Journal ArticleDOI
Synthesis and properties of tl-ba-ca-cu-o superconductors
TL;DR: In this article, the synthesis methods and properties of single crystal, powder, and thin film TlBaCaCuO high-temperature superconducting (Tl-HTS) materials are reviewed.
Journal ArticleDOI
Maximum Pinning Energy of Vortices in Anisotropic and Layered Superconductors
TL;DR: In type-II superconductors the pinning force which determines the critical current density Jc, and the pining energy U which determines thermally activated depinning, in principle are different quantities.
Journal ArticleDOI
Thallium-based HTS thin films, processing, properties and applications
TL;DR: In this paper, the authors describe the issues surrounding the fabrication of thin films of the thallium-based HTS materials and the importance of achieving biaxial grain alignment in optimizing the properties of the films.
References
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Journal ArticleDOI
Tl 1 Ca n − 1 Ba 2 Cu n O 2 n + 3 ( n = 1 , 2 , 3 ): A New Class of Crystal Structures Exhibiting Volume Superconductivity at up to ≃110 K
TL;DR: In this paper, three new phases in the Tl-Ca-Ba-Cu-O system, Tl/sub 1/Ca/sub n/sub -1/Ba/sub 2/Cu/sub +3/ (n = 1,2,3), one of which exhibits bulk superconductivity at approx. =110 K.
Journal ArticleDOI
100-K superconducting phases in the Tl-Ca-Ba-Cu-O system.
Robert M. Hazen,Larry W. Finger,Ross J. Angel,Charles T. Prewitt,Nancy L. Ross,C. G. Hadidiacos,Peter J. Heaney,David R. Veblen,Z.Z. Sheng,A. El Ali,Allen M. Hermann +10 more
TL;DR: Two superconducting phases, Tl-Ca-Ba-Cu-O system and 2122, both with onset T/sub c/ near 120 K and zero resistivity at 100 K, have been isolated from samples in the Tl/ sub 2/Ca/sub 1/Ba/sub 2/Cu/sub 3/O/sub 10/..mu../sub delta/ system.
Journal ArticleDOI
Latent track formation induced by high energy heavy ions in superconductive copper oxides
TL;DR: In this paper, a track induced enhancement of the critical magnetization current density is observed at low fluences ( φt ⩽ 3 × 10 11 cm −2 ) but it appears to depend on the value and the orientation of the applied magnetic field with respect to the direction of the tracks.
Journal ArticleDOI
Ion irradiation of epitaxial YBa 2 Cu 3 O 7 − δ films: Effects of electronic energy loss
B. Hensel,Bernhard Roas,S. Henke,R. Hopfengärtner,M. Lippert,J. P. Ströbel,M. Vildić,G. Saemann-Ischenko,S. Klaumünzer +8 more
TL;DR: The enhanced sensitivity to irradiation and the deviations from linearity are attributed to effects of additional defects induced by the {ital electronic} energy loss {ital S}{sub {ital e}}.
Journal ArticleDOI
Modifications of the physical properties of the high-Tc superconductors YBa2Cu3O7- delta (0.1 <= delta <0.7) by 3.5-GeV xenon ion bombardment.
D. Bourgault,Daniel Groult,S. Bouffard,J. Provost,F. Studer,N. Nguyen,B. Raveau,Marcel Toulemonde +7 more
TL;DR: In this paper, the effects of 35-GeV Xe ion irradiation on the superconducting (T/sub c/, J/subc/) and normal (R) properties of the high-T/Sub c/ superconductors YBa/sub 2/C/sub 3/O/sub 7-//sub delta/ with 01less than or equal todelta<07 have been investigated by means of n situ resistance measurements between 42 and 105 K.