Angular effects of transport critical currents in high-temperature superconductor tapes

Warmont, F.; Jones, H.

doi:10.1088/0953-2048/14/3/305

Cited by 9 publications

(8 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3. These features of the angular hysteresis in for line-patterned Yb123 films are similar to those observed in Bi2223 tapes [3], [4], or in Y123 low angle bicrystal films [5], [6], though the ranges of , temperature, and magnetic field are different. For the plane-patterned Yb123 film, the shift of the peak from and the hysteresis in were not observed, as seen in Fig.…”

Section: Resultssupporting

confidence: 66%

“…Thus, for these Y123 films, the magnitude of the hysteresis in curves corresponded to that in curves. The hysteresis in is observed also in Bi2223 tapes [3], [4], or in Y123 films with low angle grain boundaries [5], [6], and it is found to be closely related to the hysteresis in , in the way where the as a function of the perpendicular component of the applied field is similar to the as a function of the magnetic field applied perpendicular to the tape or film plane [3], [6]. For Y123 (A1) film, the as a function of the perpendicular component of the applied field was calculated and is shown as dashed lines with solid circle symbols in Fig.…”

Section: Resultsmentioning

confidence: 70%

“…The angular hysteresis was accompanied by the hysteresis in as a function of magnetic field . We report the experimental results and discuss them in connection with the hysteresis in or observed in (Bi2223) tapes [3], [4], or in Y123 low angle bicrystal films [5], [6]. II.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Angular Hysteresis in the Critical Current Density of Laser-Patterned ${\rm REBa}_{2}{\rm Cu}_{3}{\rm O}_{\rm y}$ Films

Nakagawa

Mawatari

Yamasaki

et al. 2007

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

The transport critical current density c as a function of applied magnetic field orientation was measured for REBa 2 Cu 3 O y (RE:Yb,Y,Dy) films that were line-patterned to make a micro bridge (20 m 2 mm) with an etched line-width of 20 m by laser etching. The angular dependent c ( ) curves measured for increasing were found to be different from those measured for decreasing . The angular hysteresis in c ( ) appeared more prominently at low temperatures and in low magnetic fields, e.g. at 40 K and at 0.1 T. For similar REBa 2 Cu 3 O y films that were plane-patterned by UV photolithography into narrow strips, angular hysteresis was not observed. The hysteresis in c ( ) was found to be closely related to the hysteresis in c as a function of applied field , which was also found in line-patterned REBa 2 Cu 3 O y films. The origin of the hysteresis in c ( ) of the line-patterned films was examined comparing the experimental results with the results of a theoretical calculation based on a model which assumes that the measured part in the bridge is influenced by the magnetic moment of the electrical terminals part adjacent to it across the etched lines.

show abstract

Section: Resultssupporting

confidence: 66%

Section: Resultsmentioning

confidence: 70%

See 1 more Smart Citation

Angular Hysteresis in the Critical Current Density of Laser-Patterned ${\rm REBa}_{2}{\rm Cu}_{3}{\rm O}_{\rm y}$ Films

Nakagawa

Mawatari

Yamasaki

et al. 2007

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

show abstract

“…5 Later, a similar effect was observed on niobium films 6 and high-temperature superconducting tapes. 7 This phenomenon manifests itself in the fact that, under small external magnetic fields, the critical current attains its maximum in a slightly tilted field. This results from the difficulties of the transition of the flux vortex lattice into the ground state with minimum energy.…”

Section: Introductionmentioning

confidence: 99%

Angular effects of the critical current inNb∕Pdmultilayers

Gavrilkin¹,

Lykov²,

Tsvetkov³

et al. 2006

Phys. Rev. B

View full text Add to dashboard Cite

The angular dependencies of the critical current density, J c ͑͒, for superconducting Nb/ Pd multilayers which show, in parallel magnetic field, a pronounced peak effect, were investigated ͑here is defined as the angle from the plane parallel to the sample surface͒. We have demonstrated that the procedure of measurements is an important factor for the J c ͑͒ shape. When rotating the sample in a fixed magnetic field H, it was found that the external field direction at which the maximum of J c was obtained form an angle different from zero with respect to the planar direction. The angular position of the maximum depends on the external magnetic field, as well as on the initial conditions under which the samples were kept. It is found that the more intense the peak effect is on the J c ͑H͒ curves, the larger the angular shift is of J c ͑͒ in these structures. The results are explained in terms of the magnetic field suppression of the percolation currents in a weak-link network. Flux trapped within grains by the flux pinning processes is relatively stable at low fields and its contributions to the transport current suppression add vectorially to the applied field.

show abstract

“…The direct consequence is a sharp decrease of the critical current density with the magnetic field at relatively 'high' temperatures (T ~ 77 K) [2,3]. An additional characteristic of Bi-2223 materials is their high anisotropy, leading to a severe dependence of the critical current density with respect to the magnetic field direction [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Intragranular and intergranular behaviour of multifilamentary Bi-2223/Ag tapes

Fagnard

Vanderbemden

Crate

et al. 2002

Physica C: Superconductivity

View full text Add to dashboard Cite

This communication aims at reporting the superconducting properties of Bi-2223/Ag tapes determined by using various measuring techniques. First, the original samples have been characterized by electrical resistance, AC susceptibility, and DC magnetization. The transport (intergranular) critical current vs. magnetic field was also determined at T = 77 K using pulsed currents up to 40 A. Next, the same combination of experiments was performed on bent tapes in order to bring out relevant information concerning the strength of the intergranular coupling. The results show that intergranular and intragranular currents differ by at least one order of magnitude. Finally, additional magnetic measurements were carried out in order to determine the anisotropy ratio J c ab /J c c , which was found to lie around 30.

show abstract

Angular effects of transport critical currents in high-temperature superconductor tapes

Cited by 9 publications

References 37 publications

Angular Hysteresis in the Critical Current Density of Laser-Patterned ${\rm REBa}_{2}{\rm Cu}_{3}{\rm O}_{\rm y}$ Films

Angular Hysteresis in the Critical Current Density of Laser-Patterned ${\rm REBa}_{2}{\rm Cu}_{3}{\rm O}_{\rm y}$ Films

Angular effects of the critical current inNb∕Pdmultilayers

Intragranular and intergranular behaviour of multifilamentary Bi-2223/Ag tapes

Contact Info

Product

Resources

About