TITLE

Planar superconductor-normal-superconductor Josephson junctions in MgB[sub 2]

AUTHOR(S)
Burnell, G.; Kang, D.-J.; Lee, H. N.; Moon, S. H.; Oh, B.; Blamire, M. G.
PUB. DATE
November 2001
SOURCE
Applied Physics Letters;11/19/2001, Vol. 79 Issue 21, p3464
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report the successful creation of planar MgB[sub 2] junctions by localized ion damage in thin (100 nm) films of MgB[sub 2] on sapphire by milling a 50 nm trench with a focused-ion beam across tracks of widths between 1 and 5 μm. When the depth of the trench is between 70% and 80% of the film thickness, devices show critical currents (I[sub C]) for temperatures below 25 K. The I[sub C] of these devices is strongly modulated by applied microwave radiation and magnetic field. The product of the critical current and normal state resistance (I[sub C]R[sub N]) is remarkably high, implying a potential for very-high-frequency applications. © 2001 American Institute of Physics.
ACCESSION #
5549554

 

Related Articles

  • Synthesis of MgB2 at Low Temperature and Autogenous Pressure. Mackinnon, Ian D. R.; Winnett, Abigail; Alarco, Jose A.; Talbot, Peter C. // Materials (1996-1944);May2014, Vol. 7 Issue 5, p3901 

    High quality, micron-sized interpenetrating grains of MgB2, with high density, are produced at low temperatures (∼420 °C < T < ∼500 °C) under autogenous pressure by pre-mixing Mg powder and NaBH4 and heating in an Inconel 601 alloy reactor for 5–15 h. Optimum production of...

  • Strongly linked current flow in polycrystalline forms of the superconductor MgB[sub2]. Larbalestier, D.C.; Cooley, L.D.; Rikel, M.O.; Polyanskil, A.A.; Jiang, J.; Patnaik, S.; Cai, X.Y.; Feldmann, D.M.; Gurevich, A.; Squitieri, A.A.; Naus, M.T.; Eom, C.B.; Hellstrom, E.E.; Cava, R.J.; Regan, K.A.; Rogado, N.; Hayward, M.A.; He, T.; Slusky, J.S.; Khalifah, P. // Nature;3/8/2001, Vol. 410 Issue 6825, p186 

    Investigates the superconductive nature of magnesium diboride at 39 Kelvin. Finding that supercurrents flow through the material without exhibiting strong sensitivity to weak magnetic fields and that the supercurrent density is determined mostly by flux pinning rather than by the grain boundary...

  • Structural, electric and magnetic properties of the electron-doped manganese oxide: La[sub 1-x]Te[sub x]MnO[sub 3] (x=0.1, 0.15). Tan, G. T.; Dai, S. Y.; Duan, P.; Zhou, Y. L.; Lu, H. B.; Chen, Z. H. // Journal of Applied Physics;5/1/2003, Vol. 93 Issue 9, p5480 

    In this study, the electrical and magnetic properties of La[sub 1-x]Te[sub x]MnO[sub 3] (x=0.1, 0.15), which is a new material and shows good colossal magnetoresistance behavior, have been investigated. These compounds have rhombohedral structure. In this material, Te replaced a part of La ions,...

  • Fabrication of MgB2 bulk magnets with high critical currents. Muralidhar, Miryala; Inoue, Kazuo; Koblischka, Michael R.; Murakami, Masato // Advances in Science & Technology;2014, Vol. 95, p196 

    We report on the fabrication and characterization of disk-shaped bulk MgB2 superconductors with high performance as superconducting bulk magnets. Several samples of diameters 20 mm, 30 mm and 40 mm were fabricated using a solid state reaction in pure Ar atmosphere at 775°C for 3h. The...

  • High critical current density in iron-clad MgB[sub 2] tapes. Fang, H.; Padmanabhan, S.; Zhou, Y. X.; Salama, K. // Applied Physics Letters;6/9/2003, Vol. 82 Issue 23, p4113 

    Iron-clad MgB[SUB2] superconducting tapes with a MgB[SUB2] core cross-section area of 1.07 × 10[SUP-3] cm[SUP2] were fabricated using the standard powder-in-tube method. The starting precursor was ultrafine Mg and B mixture powder prepared by high-energy ball milling. Very good grain...

  • Degradation of MgB[sub 2] under ambient environment. Serquis, A.; Zhu, Y. T.; Peterson, D. E.; Mueller, F. M.; Schulze, R. K.; Nesterenko, V. F.; Indrakanti, S. S. // Applied Physics Letters;6/10/2002, Vol. 80 Issue 23, p4401 

    The superconductivities of samples prepared by several procedures were found to degrade under ambient environment. The degradation mechanism was studied by measuring the change of surface chemical composition of dense MgB[sub 2] pellets (prepared by hot-isostatic pressure, HIPed) under...

  • Influence of microstructures and crystalline defects on the superconductivity of MgB[sub 2]. Serquis, A.; Liao, X. Z.; Zhu, Y. T.; Coulter, J. Y.; Huang, J. Y.; Willis, J. O.; Peterson, D. E.; Mueller, F. M.; Moreno, N. O.; Thompson, J. D.; Nesterenko, V. F.; Indrakanti, S. S. // Journal of Applied Physics;7/1/2002, Vol. 92 Issue 1, p351 

    This work studies the influence of microstructures and crystalline defects on the superconductivity of MgB[sub 2], with the objective to improve its flux pinning. A MgB[sub 2] sample pellet that was hot isostatic pressed (HIPed) was found to have significantly increased critical current density...

  • The complex nature of superconductivity in MgB[sup 2] as revealed by the reduced total isotope effect. Hinks, D.G.; Claus, H.; Jorgensen, J.D. // Nature;5/24/2001, Vol. 411 Issue 6836, p457 

    Describes the complex nature of superconductivity in magnesium diboride that is revealed by the reduced total isotope effect. Significance of the presence of isotope effect; Component of the crystal structure of magnesium diboride; Device used in the measurement of magnetizations of the samples.

  • Hyperfine interactions of copper ions in the structure of high-temperature superconductors. Bordovskii, G.; Anisimova, N.; Marchenko, A.; Rabchanova, T.; Seregin, P.; Tomil'tsev, E. // Glass Physics & Chemistry;May2014, Vol. 40 Issue 3, p333 

    Emission Mössbauer Cu(Ni) spectra of simple MgO, NiO, CuO, CuO oxides and superconducting LaSrCuO, NdCeCuO, and YBaCuO copper metal oxides have been measured. It has been shown that emission Mössbauer spectroscopy on isotopes Cu(Ni) makes it possible to determine the parameters of the...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics