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Tuesday, August 4, 2020 | History

2 edition of Pulsed-current transitions in superconducting thin films. found in the catalog.

Pulsed-current transitions in superconducting thin films.

Michael Robert Simon Wertheimer

Pulsed-current transitions in superconducting thin films.

by Michael Robert Simon Wertheimer

  • 343 Want to read
  • 21 Currently reading

Published in [Toronto] .
Written in English

    Subjects:
  • Electric conductivity,
  • Electric currents,
  • Metallic films

  • Edition Notes

    ContributionsToronto, Ont. University.
    Classifications
    LC ClassificationsLE3 T525 MA 1963 W47
    The Physical Object
    Pagination43, [2] leaves.
    Number of Pages43
    ID Numbers
    Open LibraryOL14745262M

    Superconducting transition temperature of thin films in magnetic field is investigated. The linearized gap equation is derived by a quasiclassical Green's function method, which correctly includes the boundary effects and the impurity scattering effects.   A research group at Tohoku University has succeeded in fabricating an atomically thin, high-temperature superconductor film with a superconducting transition temperature (Tc) of .

    For T D > °C the structural and electrical properties of the grown thin films are in good accordance to the results of Huang et al. As is evident from our investigation the superconducting transition temperature increases with decreasing T D and has a maximum of . Purchase High-Temperature Superconducting Materials Science and Engineering - 1st Edition. Print Book & E-Book. ISBN ,

      This book describes investigations ofthe superconductingphase transition of YBCO thin films in zero magneticfield. Simple voltage vs. current curves at temperatures closeto the transition temperature show that thestandard scaling analysisfails at low currents, contrary to what is widelyaccepted -- but that there isevidence for the phase. Phase Transition in Superconducting Thin Films of Tl System Employing a One-Zone Furnace and Deposited by Spray Pyrolysis some bulk superconductors has already been completed in the furnace a zone [16,17]. However, as far as it is consulted, it has not been reported obtaining thin films of Tl system on a one zone oven, nor undertaken a.


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Pulsed-current transitions in superconducting thin films by Michael Robert Simon Wertheimer Download PDF EPUB FB2

RESULTS. Our data were obtained from two very different superconducting systems. The first is amorphous indium oxide (a:InO) thin film (Fig.

1, A and B), known for its high level of disorder reflected by high R N (≲ h 4 e 2 ≃ kilohms).The second system we investigated is made of sheets exfoliated from a single crystal of 2H-NbSe 2 (Fig. 1, C and D), which are of high purity and are Cited by:   Superconducting FeSe thin films were prepared at a substrate temperature of °C by pulsed laser deposition.

X-ray diffraction and transmission electron microscopic analyses showed that highly c-axis-orientated and high-quality films were obtained on various substrate materials, including single-crystal MgO, LaAlO 3, SrTiO 3 and ()-Si, and amorphous-SiO x, at such low by:   Abstract: We present an investigation on the intrinsic optical properties of superconducting FeSe thin films deposited on CaF 2 substrates.

It is found that the samples respond strongly to the near-infrared (NIR) irradiation in different temperature regimes. Thus, we are able to measure the optical reflectivity of the in-plane (ab-plane) thin films from room temperature to 5 : Yanmin Zhang, Wen Xu, Zhongpei Feng, Zefeng Lin, Kui Jin, Jie Zhang, Shun Zhou, Zhaojun Liu, Chen Gu.

6 the ML films are displayed in Fig. Two key results of this experiment are that T ’s for films of d = ML scale linearly with d and that T ’s for films of d = ML are distinctly higher than T ’s. T increases rapidly from K for the 1 ML film 20 to K for the 4 ML film (Fig.

S3), and then exhibits an oscillatory dependence on d. Browse book content. About the book. Search in this book. Search in this book. Browse content Select Superconducting transition and fluctuation conductivity of Bi(Pb)-Sr-Ca-Cu-O thin films made by sputtering Select Preparation of YBa2Cu3O7-x superconducting thin films on silicon nitride by plasma-assisted laser ablation.

Phase-slip centers (PSCs) are one of the main mechanisms for dissipation in narrow current-carrying superconducting thin films, resulting in the formation of pronounced steps in both voltage versus temperature [] and current–voltage characteristics [2, 3].In the phase-slip state the superconducting order parameter oscillates in time allowing the phase to relax by quanta of [4, 5].

Superconducting titanium nitride (TiN) thin films were deposited on magnesium oxide, sapphire and silicon nitride substrates at °C, using a pulsed laser deposition (PLD) technique, where infrared ( nm) pulses from a solid-state laser were used for the ablation from a titanium target in a nitrogen atmosphere.

Thin Film Metal-Oxides provides a representative account of the fundamental structure-property relations in oxide thin films. Functional properties of thin film oxides are discussed in the context of applications in emerging electronics and renewable energy technologies.

Readers will find a. Thin films grow with twins along the [] and [] directions, which are manifested in the two-peak structure of the 20 u.c. film. With increasing thickness, the twinning shifts toward the [] and [1 1 ¯ 0] directions. This transition is seen in the 40 u.c.

film. Animation & Cartoons Arts & Music Computers & Technology Cultural & Academic Films Ephemeral Films Movies News & Public Affairs Understanding 9/11 Spirituality & Religion Sports Videos Television Videogame Videos Vlogs Youth Media.

First results are reported on film deposition conditions, film composition and structure, and on the effect of post-deposition anneals on superconducting properties.

As a superconducting thin film becomes disordered and subject to an increasing magnetic field, a point is reached when it undergoes a transition from a superconducting to an insulating state. Dubi. The Tc of the superconducting MoN films, which exhibit a sharp superconducting transition, monotonically decreases as the normal state Rsq increases with a decreasing film thickness.

In this paper we present a new method to measure the microwave surface resistance of superconducting thin- films at cryogenic temperatures. The method, based on the principle of the equivalence of the thermal effects, is effective for the superconductors that generally have a good bolometric behavior in the transition region.

The Conference on the Science and Technology of Thin Film Superconductors was conceived in the early part of as a forum for the specialist in thin film superconductivity.

The conference was held on November, in Co lorado Springs, Co lorado. Phase Transformations in PZT Thin Films Prepared by Polymeric Chemical Method. Elton C. Lima, Eudes Borges Araújo. Advances in Materials Physics and Chemistry Vol.2 No.3,Septem DOI: /ampc 5, Downloads 8, Views Citations.

Abstract: We investigate transition to the superconducting state in the ultrathin titanium nitride films on approach to superconductor-insulator transition. Building on the complete account of quantum contributions to conductivity, we demonstrate that the resistance of thin superconducting films exhibits a non-monotonic temperature behaviour due to the competition between weak.

We report our studies on ultrafast voltage transients of optically thick superconducting YBa 2 Cu 3 O 7−x microbridges biased with nanosecond supercritical current pulses (I > I c) and, simultaneously, illuminated with fs optical pulses ( nm wavelength) from a Ti:sapphire pulsed current bias created a resistive flux-flow state in the superconductor, while the laser pulse.

Abstract. Thin superconducting films form a unique platform for geometrically confined, strongly interacting electrons. They allow an inherent competition between disorder and superconductivity, which in turn enables the intriguing superconducting-to-insulating transition and is believed to facilitate the comprehension of high-T c superconductivity.

Furthermore, understanding thin film. Surface morphology, superconducting transition temperature and crystalline orientation strongly depend on a partial oxygen pressure during deposition. The smooth and highly crystal‐oriented films with the superconducting transition temperature above 80 K and transport critical current densities of ×10 5 A/cm 2 (without magnetic field at.

Lastly, as regards the Berezinskii-Kosterlitz-Thouless (BKT) transition in superconducting thin films, specifically in thin films of Pb, you may wish to consult Sec. of the book by MT.This unconventional solution indicates the existence of superconducting phase transitions of third order in thin films, or in bulk matter with a layered structure.

The critical temperature increases with decreasing thickness of the layer, and does not exhibit the isotope effect. We demonstrate the successful fabrication on CaF 2 substrates of FeSe 1−x Te x films with 0 ≤ x ≤ 1, including the region of ≤ x ≤which is well known to be the “phase-separation region,” via pulsed laser deposition that is a thermodynamically nonequilibrium the resulting films, we observe a giant enhancement of the superconducting transition temperature, T c.