Superconducting transport properties of Bi2Sr2CaCu2O8+<i>x</i> bicrystal grain boundary junctions

Mayer, Bernd; Alff, Lambert; Träuble, T.; Gross, Rudolf; Wagner, Patrick; Adrian, H.

doi:10.1063/1.109818

Cited by 47 publications

(18 citation statements)

References 13 publications

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“…For the B1M30HA750 sample, the resistivity of the grain boundaries is high, [59]. This is consistent with DN calculated using equation (10), and shows that it is possible to increase pinning across grain boundaries.…”

Section: Discussionsupporting

confidence: 75%

“…For B1M30HA750, the grain boundary resistivity is GB = 9.71×10 −3 Ωm. These values are almost a thousand times larger than microcrystalline values, but are nevertheless similar to Mayer's [59] grain boundary values of (2.0 − 6.5)×10 −3 Ωm on Bi-2212 bicrystals. For the B2 samples, the grain boundary resistivity in all our samples are large.…”

Section: The Resistivity Of the Grain Boundariesmentioning

confidence: 60%

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The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors

Wang

Raine

Hampshire

2018

Supercond. Sci. Technol.

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Publisher's copyright statement:Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Manuscript version: Accepted Manuscript Accepted Manuscript is "the version of the article accepted for publication including all changes made as a result of the peer review process, and which may also include the addition to the article by IOP Publishing of a header, an article ID, a cover sheet and/or an 'Accepted Manuscript' watermark, but excluding any other editing, typesetting or other changes made by IOP Publishing and/or its licensors"This Accepted Manuscript is © 2017 IOP Publishing Ltd.As the Version of Record of this article is going to be / has been published on a gold open access basis under a CC BY 3.0 licence, this Accepted Manuscript is available for reuse under a CC BY 3.0 licence immediately.Everyone is permitted to use all or part of the original content in this article, provided that they adhere to all the terms of the licence https://creativecommons.org/licences/by/3.0Although reasonable endeavours have been taken to obtain all necessary permissions from third parties to include their copyrighted content within this article, their full citation and copyright line may not be present in this Accepted Manuscript version. Before using any content from this article, please refer to the Version of Record on IOPscience once published for full citation and copyright details, as permissions may be required. All third party content is fully copyright protected and is not published on a gold open access basis under a CC BY licence, unless that is specifically stated in the figure caption in the Version of Record.View the article online for updates and enhancements. AbstractThe detrimental effects of grain boundaries have long been considered responsible for the low critical current densities ( c ) in high temperature superconductors. In this paper, we apply the quantitative approach used to identify the cause of the 'weak-link' grain boundary behaviour in YBa2Cu3O7 [1], to the Bi2Sr2CaCu2O8 and Bi2Sr2Ca2Cu3O10 materials that we have fabricated. Magnetic and transport measurements are used to characterise the grain and grain boundary properties of micro-and nanocrystalline material. Magnetisation measurements on all nanocrystalline materials show non-Bean-like behaviour and are consistent with sur...

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Section: Discussionsupporting

confidence: 75%

Section: The Resistivity Of the Grain Boundariesmentioning

confidence: 60%

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors

Wang

Raine

Hampshire

2018

Supercond. Sci. Technol.

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“…This value is comparable with similar bicrystal junctions of YBCO [4] and higher than values obtained in former publications for BSCCO bicrystal junctions [5]. The critical current density, J c , for this junction was 1.3 Â 10 4 A/cm 2 , and for all the junctions J c was always about two orders of magnitude lower than J c in BSCCO films.…”

Section: Resultssupporting

confidence: 65%

Structural and Electrical Properties of Grain Boundary Josephson Junctions Based on Bi2Sr2CaCu2O8+δ Thin Films

Lopera¹,

Giratá²,

Osorio³

2000

phys. stat. sol. (b)

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An in situ deposition sputtering process at high pressure has been developed for preparing high quality superconducting Bi2Sr2CaCu2O8+δ thin films on different substrates. Both microstructural and electrical properties were well characterized by TEM, AFM, RBS, X‐ray diffraction, resistivity and magnetic susceptibility. The high reproducibility of the film quality facilitated a detailed study of Josephson effect in bicrystalline grain boundary junctions (GBJs). Thin films were deposited on (001) SrTiO3 bicrystals with misorientation angles of 24° and patterned by a photolithography process using Br‐ethanol chemical etching. The width of the microbridges ranges from 10 to 50 μm. The critical current densities across the grain boundary have been measured and compared to the critical current in the film. A modulation in the critical current was found under magnetic field and also Shapiro steps in the I–V curves under microwave irradiation have been observed indicating a Josephson behavior. Electrical properties are well described by the resistively shunted junction (RSJ) model. The IcRn product reaches values around 2.0 mV at 4.2 K.

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“…We note that the T c reduction in the oxygen deficient YBCO is obtained by well controlled oxygen depletion and is not caused by the presence of magnetic impurities in the samples or at the grain boundary. Furthermore, BSCCO-GBJs were fabricated in the same way with a T c of the BSCCO-films of about 80 K [72]. This T c value is reduced by about 10 K as compared to optimum doped samples [73].…”

Section: Sample Preparation and Experimental Techniquesmentioning

confidence: 99%

Andreev bound states in high temperature superconductors

et al. 1998

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Abstract. Andreev bound states at the surface of superconductors are expected for any pair potential showing a sign change in different k-directions with their spectral weight depending on the relative orientation of the surface and the pair potential. We report on the observation of Andreev bound states in high temperature superconductors (HTS) employing tunneling spectroscopy on bicrystal grain boundary Josephson junctions (GBJs). The tunneling spectra were studied as a function of temperature and applied magnetic field. The tunneling spectra of GBJ formed by YBa2Cu3O 7−δ (YBCO), Bi2Sr2CaCu2O 8+δ (BSCCO), and La1.85Sr0.15CuO4 (LSCO) show a pronounced zero bias conductance peak that can be interpreted in terms of Andreev bound states at zero energy that are expected at the surface of HTS having a d-wave symmetry of the order parameter. In contrast, for the most likely s-wave HTS Nd1.85Ce0.15CuO4−y (NCCO) no zero bias conductance peak was observed. Applying a magnetic field results in a shift of spectral weight from zero to finite energy. This shift is found to depend nonlinearly on the applied magnetic field. Further consequences of the Andreev bound states are discussed and experimental evidence for anomalous Meissner currents is presented.

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Superconducting transport properties of Bi2Sr2CaCu2O8+x bicrystal grain boundary junctions

Cited by 47 publications

References 13 publications

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors

Structural and Electrical Properties of Grain Boundary Josephson Junctions Based on Bi2Sr2CaCu2O8+δ Thin Films

Andreev bound states in high temperature superconductors

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Superconducting transport properties of Bi2Sr2CaCu2O8+x bicrystal grain boundary junctions

Cited by 47 publications

References 13 publications

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi2Sr2CaCu2O8and Bi2Sr2Ca2Cu3O10superconductors

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi2Sr2CaCu2O8and Bi2Sr2Ca2Cu3O10superconductors

Structural and Electrical Properties of Grain Boundary Josephson Junctions Based on Bi2Sr2CaCu2O8+δ Thin Films

Andreev bound states in high temperature superconductors

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The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors

The cause of ‘weak-link’ grain boundary behaviour in polycrystalline Bi₂Sr₂CaCu₂O₈and Bi₂Sr₂Ca₂Cu₃O₁₀superconductors