Anisotropic nonmonotonic behavior of the superconducting critical current in thin<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Y</mml:mi><mml:msub><mml:mi mathvariant="normal">Ba</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Cu</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mrow><mml:mn>7</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></m

Cantoni, Claudia; Verebelyi, D. T.; Specht, E. D.; Budai, J. D.; Christen, D. K.

doi:10.1103/physrevb.71.054509

Cited by 20 publications

(21 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, anti-phase boundaries (APBs) can be expected to occur in a vicinal film. In transport measurements on YBCO films grown on substrates with miscut angles of 4 and 8 APBs were identified as the reason for different values in the L and T direction [11]. In spite of this in the present study no difference was observed in of the two tracks.…”

Section: Resultscontrasting

confidence: 78%

Critical Current Densities of MOCVD Tapes for Different Current Directions

Weigand

Rutter

Sahonta

et al. 2011

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

The critical current density of an MOCVD/IBAD coated conductor was measured on tracks patterned longitudinally (L) and transversely (T) to the tape direction. Despite the samples' vicinality no dependence of on track direction was found for magnetic fields applied perpendicular to the film plane. In angular out-of-plane measurements the previously reported asymmetry due to tilted precipitate planes was observed in an L track, whereas curves from a T track were almost perfectly symmetric with similarly high absolute values of . At low fields the effects of surface pinning were seen. Our results show that in most scenarios the current carrying capability is equally as good parallel and perpendicular to the tape direction, which is highly relevant for ROEBEL cables. In measurements where the magnetic field was swept in the film plane the anisotropy was found to be significantly higher than for MOD/RABiTS samples, which we explain by the different morphology of grain boundaries in the tapes. At low temperatures of a T track exhibited a clear signature of vortex channeling.

show abstract

Section: Resultscontrasting

confidence: 78%

Critical Current Densities of MOCVD Tapes for Different Current Directions

Weigand

Rutter

Sahonta

et al. 2011

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

show abstract

“…for all the films. Maximum critical current densities in this range were also reported by other authors [14,15], although larger j S were measured on films deposited either on vicinal substrates [14] or on nanobridges [16,17] In order to confirm the validity of our determination of the T c profiles, the oxygen content of film B, whose characteristics are reported in Table 1, was measured by Non Rutherford Elastic Resonance Scattering (NRERS) by J.Siejka (INSP-Paris) [19]. The oxygen content of film B was found to be depth dependent.…”

Section: Determination Of the T C Profilessupporting

confidence: 89%

Determination of the critical temperature and oxygen content variations along the c-axis of YBCO epitaxial films

Thimont

Hamet

Mouchel

et al. 2010

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The existence of non-superconducting zones in YBa 2 Cu 3 O 7-δ (YBCO) films below the transition temperature to the non-resistive state can be the cause of losses that limit the performances of YBCO devices. In this contribution, from the dependence on temperature of the surface critical current density of YBCO films we examine the possibility that their superconducting critical temperature, is non-uniform along their c-axis.

show abstract

“…12,21 The rapid falloff at higher fields and vanishing of J c at B irr is well-represented by the last factor, chosen with a physically reasonable fixed exponent of 2. model Eq. ͑1͒ is also exhibited in the Fig.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of flux pinning and critical currents in YBa2Cu3O7−δ films by nanoscale iridium pretreatment of substrate surfaces

Aytuğ

Paranthaman

Gapud

et al. 2005

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

We have acquired positive results in a controlled study to investigate the effects of substrate surface modification on the growth-induced flux-pinning nanostructures in YBa2Cu3O7−δ (YBCO) films. Nanoscale iridium (Ir) particles were applied to single-crystal SrTiO3 substrate surfaces using dc-magnetron sputtering. Superconducting properties of YBCO films grown on the Ir-modified substrates, measured by transport and magneto-optical imaging, have shown substantial improvement in the critical current densities (Jc) at 77 K over those on untreated, control substrates. Results also show a nearly uniform enhancement of Jc over all orientations of magnetic field. Present results are found to be consistent with cross-sectional transmission electron microscopy investigations. Ultimately, the objective of this approach is to produce enhancements in the properties of coated conductors by a simple pretreatment of the substrate surface.

show abstract

Anisotropic nonmonotonic behavior of the superconducting critical current in thinYBa2Cu3O7−δ

Abstract: The critical current density of epitaxial YBa 2 Cu 3 O 7-δ (YBCO) films grown on vicinal

Cited by 20 publications

References 26 publications

Critical Current Densities of MOCVD Tapes for Different Current Directions

Critical Current Densities of MOCVD Tapes for Different Current Directions

Determination of the critical temperature and oxygen content variations along the c-axis of YBCO epitaxial films

Enhancement of flux pinning and critical currents in YBa2Cu3O7−δ films by nanoscale iridium pretreatment of substrate surfaces

Contact Info

Product

Resources

About