Reactivity and passivation for Bi adatoms on YBa2Cu3O6.9 and Bi2Ca1+xSr2-xCu2O8+y

Meyer, H. M.; Hill, D. M.; Weaver, J. H.; Nelson, D. L.; Goretta, K. C.
September 1988
Applied Physics Letters;9/12/1988, Vol. 53 Issue 11, p1004
Academic Journal
X-ray photoemission spectroscopy was used to examine the reactivity of clean YBa[sub 2]Cu[sub 3]O[sub 6.9] and Bi[sub 2]Ca[sub 1+x]Sr[sub 2-x]Cu[sub 2]O[sub 8+y] surfaces with adatoms of vapor-deposited bismuth. For YBa[sub 2]Cu[sub 3]O[sub 6.9], depositions ≤8 Å of Bi induce O 1s, Cu 2p[sub &frac32;], and Bi 4f line-shape changes due to Bi-O bonding, limited oxygen loss from the substrate, partial conversion of Cu[sup 2+] to Cu[sup 1+], and growth of Bi metal. For coverages greater than 8 Å, there is no reaction and only Bi metal growth is observed. For Bi deposition onto Bi[sub 1]Ca[sub 1+x]Sr[sub 2-x]Cu[sub 2]O[sub 8+y], there is minimal reaction with only subtle O 1s and Ca 2p[sub &frac32;] line-shape changes and the nucleation and growth of Bi metal starting at low coverages (≥2 Å). Comparison shows that Bi is tess reactive than other metals, except Ag and Au, and that Bi[sub 2]Ca[sub 1+x]Sr[sub 2-x]Cu[sub 2]O[sub 8+y] is more stable toward Bi deposition than YBa[sub 2]Cu[sub 3]O[sub 6.9].


Related Articles

  • Influence of Substrates in HTS Wires on AC Loss Characteristics of Cylindrical Single Layer Conductors. Yao, Z.; Li, Z.; Ma, J.; Yu, Z.; Ma, Y.; Ryu, K.; Yang, H. // Journal of Superconductivity & Novel Magnetism;Dec2015, Vol. 28 Issue 12, p3447 

    Substrates of high temperature superconductor (HTS) wires can change the magnetic field distribution of the wires, with the consequence that they can affect AC losses of the HTS wires, which is a critical issue in HTS applications. In this study, in order to investigate the effects of the...

  • Optical measurements of the superconducting gap in single-crystal K3C60 and Rb3C60. Degiorgi, L.; Briceno, G. // Nature;6/16/1994, Vol. 369 Issue 6481, p541 

    Reports on measurements of superconducting energy gap in large single-crystal samples of alkali-metal compounds K3C60 and Rb3C60. Reflexivity of both compounds in the normal state and their reflexivity spectra in the far-infrared; Consistency of the reduced gap ratio with predictions for a...

  • Superconductivity of strongly correlated electrons in copper and ruthenium oxides within the t–J–I model. Kuz’min, E. V.; Ovchinnikov, S. G.; Baklanov, I. O. // Journal of Experimental & Theoretical Physics;Aug99, Vol. 89 Issue 2, p349 

    We propose a t-J-I model with direct ferromagnetic exchange I to explain the superconductivity of copper oxides and the ruthenate Sr[sub 2]RuO[sub 4] on the basis of the analysis of the electronic structure of these substances. We analyze the possible p- and d-type superconducting solutions....

  • Superconductivity in CaCuO[sub 2] as a result of field-effect doping. Schon, J.H.; Dorget, M.; Beuran, F.C.; Zu, X.Z.; Arushanov, E.; Cavellin, C. Deville; Lagues, M. // Nature;11/22/2001, Vol. 414 Issue 6862, p434 

    Investigates the superconductivity of copper oxide employing field-effect doping. Advantage of obtaining superconductivity; Induction of superconductivity in the nominally insulating material; Exploration of the whole doping process via changing the gate voltage.

  • Model for superconductivity in optimally doped electron cuprates. Geballe, T. H.; Moyzhes, B. Y. // Low Temperature Physics;Sep/Oct2001, Vol. 27 Issue 9/10, p777 

    The very anomalous normal state properties and superconductivity of electron-doped superconducting cuprates with the T∗ structure are discussed. The high values of the electron and hole mobilities in the literature are explained by the electrons and holes existing in different layers. The...

  • New Experiments Highlight Universal Behavior in Copper Oxide Superconductors. Levi, Barbara Goss // Physics Today;Sep2004, Vol. 57 Issue 9, p24 

    Provides information on experiments that highlight the universal behavior in copper oxide superconductors. Functionality of scanning tunneling microscopy; Oxides on which neutron scattering studies have been conducted; Pattern taken by electronic modulation in bismuth strontium calcium copper...

  • Superconductive and Magnetic Properties of BiSrCaCuO Ceramics Doped by Pb. Mahtali, M.; Chamekh, S. // Journal of Superconductivity & Novel Magnetism;Feb2011, Vol. 24 Issue 1/2, p351 

    mong the superconducting phases of bismuth-based Bi-Sr-Ca-Cu-O, compound BiSrCaCuO (Bi-2223) is the most interesting because of its relatively high critical temperature ( T=95-110 K) and numerous applications. However, this phase is also known for its low stability and the difficulty of...

  • The Role of PbO Nanoparticles Doping on the Stability of Bi-2223 Phase in BiPbSrCaCuO Compounds. Mousavi Ghahfarokhi, S.; Manhoush, N.; Kazeminezhad, I. // Journal of Superconductivity & Novel Magnetism;Jan2016, Vol. 29 Issue 1, p33 

    In this paper, β-PbO nanoparticles were prepared by microwave method irradiation. BiPbSrCaCuO compounds were doped with different values of PbO nanoparticles such as x = 0.0, 0.2, 0.4, and 0.6 using a solid-state reaction method with annealing times of 30, 60, 90, and 150 h. The prepared...

  • Composite Bi-2212/Ag Superconductors Grown by Laser Travelling Floating Zone at Low Rates. Diez, J.; Sotelo, A.; Rasekh, S.; Amaveda, H.; Torres, M.; Bosque, P.; Chocarro, C.; Madre, M. // Journal of Superconductivity & Novel Magnetism;Feb2015, Vol. 28 Issue 2, p415 

    Well-textured BiSrCaCuO/2.9 wt % Ag composite samples have been grown by the laser floating zone at very low rates (1, 3, and 5 mm/h). The as-grown samples present superconducting behavior, as a result of being composed by long and well-textured Bi-2212 grains as major phase. After annealing,...


Read the Article


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

Try another library?
Sign out of this library

Other Topics