Field dependence of superconducting properties of YBa2Cu3O7−δ films on Hastelloy substrates

Quinton, W.A.J.; Baudenbacher, Franz; Liang, W. Y.

doi:10.1016/s0921-4534(98)00522-x

Cited by 7 publications

(7 citation statements)

References 17 publications

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“…This power law is observed in numerous experiments and was used in theories on creep (Vinokur et al 1991;Gurevich and Brandt 1994;Schuster et al 1995a), flux penetration (Schuster et al 1994a(Schuster et al , 1994b(Schuster et al , 1995b(Schuster et al , 1996 and AC susceptibility (Rhyner 1993;Gilchrist and van der Beek 1994;Brandt 1995;Schuster et al 1995Schuster et al , 1996. The value of E c in recent reports ranges from 10 −5 to 10 −4 V m −1 (Wen and Zhao 1995; Higgins and Bhattacharya 1996; Doyle et al 1998). However, it should be noted that the time-honoured EFC is unreasonable to determine the critical current density for HTSC, because the decay of voltage with decreasing current is not so abrupt as in conventional superconductors.…”

Section: Determination Of Characteristic Pinning Potential and Criticmentioning

confidence: 89%

“…But to our knowledge, because there is no theoretical discussion about J c and J E and a quantitative comparison between them, the EFC is still widely used in investigations on the vortex matter in HTSC. The inadequate substitution of J E for J c and the arbitrary choice of EFC from 10 −1 to 10 −5 V m −1 has inevitably brought some dubious conclusions (Mannhart et al 1988;Mankiewich et al 1989;Sueyoshi et al 1998;Doyle et al 1998) and covered up the physical implication of J c .…”

Section: Introductionmentioning

confidence: 99%

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Real Critical Current Density and Material Power Law of YBa2Cu3O7-d Epitaxial Thin Film

Shan¹,

Aruna²,

Xu³

et al. 2000

Aust. J. Phys.

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The current–voltage characteristics have been measured on aYBa2Cu3O7-δ epitaxial thin film. Using a material power law, we determine the temperature and field dependencies of the characteristic pinning potential UJand the real critical current density Jc at different fields and temperatures. It is shown that Jc is completely different from the conventional critical current density JE, which is determined by the electronic-field criterion. Thus, the time-honoured electronic-field criterion is no longer reasonable for high-Tc superconductors. By further investigation of the results of Jc and UJ, we are able to present a physical picture of the transformation of the pinning potential well with increasing temperature and hence determine the transition point from vortex-glass phase to vortex-liquid phase.

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Section: Determination Of Characteristic Pinning Potential and Criticmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Real Critical Current Density and Material Power Law of YBa2Cu3O7-d Epitaxial Thin Film

Shan¹,

Aruna²,

Xu³

et al. 2000

Aust. J. Phys.

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“…RABiTS and IBAD superconducting tapes exhibit J c comparable to YBCO films deposited on single crystal, about 1-3 MA/cm 2 [4,5]. Compared to the other methods, ISD superconducting tape performances are less impressive, about 0.8-0.4 MA/cm 2 , but this technique is attractive for industrial scalability perspectives [6,7].…”

Section: Introductionmentioning

confidence: 98%

“…6 (YBCO) thick films on flexible metallic substrates. In the Rolling Assisted Biaxially Textured Substrate (RABiTS) method, epitaxial growth mechanisms allow texture transfer from substrate to buffer layer and finally to the superconducting film [1], In Ion Beam Assisted Deposition (IBAD) and Inclined Substrate Deposition (ISD) methods randomly oriented or amorphous metallic substrates are used, so that these techniques are focused on the development of a biaxially aligned oxides buffer layer as seed layer for YBCO epitaxial growth [2,3].…”

Section: Introductionmentioning

confidence: 99%

INCLINED SUBSTRATE DEPOSITED CeO₂ FILMS BY ELECTRON BEAM EVAPORATION ON RANDOMLY ORIENTED METALLIC SUBSTRATE

Mancini

Celentano

Fabbri

et al. 2003

Int. J. Mod. Phys. B

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A study on CeCh film growth on randomly oriented metallic substrate using Inclined Substrate Deposition (ISD) technique was performed in order to develop a biaxially aligned buffer layer for YBa2Cu3C>7_5 (YBCO) coated conductors. The influence of deposition parameters, as the substrate inclination angle a with respect to the CeC>2 vapor direction, deposition temperature and film thickness, on structural and morphological properties of the film was investigated. At substrate temperature between 200°C and 700°C a biaxial texture was observed for a ranging from 15° to 75°. The minimum value of the (|)-scan full width at half maximum (FWHM) on (002) poles of about 13.5° was obtained for film 2 Jim thick deposited at 200°C and 0^55°. Morphological analyses on cross-sectioned samples revealed a columnar structure, typical for this deposition technique, with spaced grains and a tile like surface.

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“…In this paper, we measured the angular dependence of under two conditions of the constant Lorentz force configuration (CLFC) and the variable Lorentz force configuration (VLFC) in order to clarify the pinned state of vortices in -axis oriented YBCO thin films [6], [7]. The pinning mechanism in YBCO thin film is discussed based on the results.…”

Section: Introductionmentioning

confidence: 99%

Angular Dependence of Critical Current Density in Y-Ba-Cu-O Thin Films

Horide

Matsumoto

Ichinose

et al. 2005

IEEE Trans. Appl. Supercond.

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axis oriented YBa 2 Cu 3 O 7 (YBCO) thin films for coated conductor applications have anisotropic behaviors of critical current density ( ) in magnetic fields. The anisotropic vortex pinning in YBCO films fabricated on SrTiO 3 (100) single crystal substrates by pulsed laser deposition was investigated based on the field angular dependencies of , which were measured using the constant Lorentz force configuration (CLFC) and a variable Lorentz force configuration (VLFC).( ) as a function of angle between the -plane direction and the magnetic field direction had a sharp peak at = 0 , which was attributed to the intrinsic pinning. Besides, ( ) did not depend on the intensity of the Lorentz force when the magnetic field was applied near = 90 . This indicates that ( ) in this region is determined by the depinning of the vortex segment trapped by the pinning centers parallel to -axis of the film. A transition from the intrinsic pinning to the extrinsic pinning is also discussed.Index Terms-Critical current density, Lorentz force, vortex pinning, YBCO thin film.

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Field dependence of superconducting properties of YBa2Cu3O7−δ films on Hastelloy substrates

Cited by 7 publications

References 17 publications

Real Critical Current Density and Material Power Law of YBa2Cu3O7-d Epitaxial Thin Film

Real Critical Current Density and Material Power Law of YBa2Cu3O7-d Epitaxial Thin Film

INCLINED SUBSTRATE DEPOSITED CeO₂ FILMS BY ELECTRON BEAM EVAPORATION ON RANDOMLY ORIENTED METALLIC SUBSTRATE

Angular Dependence of Critical Current Density in Y-Ba-Cu-O Thin Films

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Field dependence of superconducting properties of YBa2Cu3O7−δ films on Hastelloy substrates

Cited by 7 publications

References 17 publications

Real Critical Current Density and Material Power Law of YBa2Cu3O7-d Epitaxial Thin Film

Real Critical Current Density and Material Power Law of YBa2Cu3O7-d Epitaxial Thin Film

INCLINED SUBSTRATE DEPOSITED CeO2 FILMS BY ELECTRON BEAM EVAPORATION ON RANDOMLY ORIENTED METALLIC SUBSTRATE

Angular Dependence of Critical Current Density in Y-Ba-Cu-O Thin Films

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INCLINED SUBSTRATE DEPOSITED CeO₂ FILMS BY ELECTRON BEAM EVAPORATION ON RANDOMLY ORIENTED METALLIC SUBSTRATE