Observation of a halide (F/Cl) stabilized, new perovskite phase in superconducting Y2Ba5Cu7Ox films

Kwo, J.; Hong, M.; Fleming, R. M.; Hebard, A. F.; Mandich, M. L.; DeSantolo, A. M.; Davidson, B. A.; Marsh, P.; Hobbins, N. D.
May 1988
Applied Physics Letters;5/9/1988, Vol. 52 Issue 19, p1625
Academic Journal
A new, ordered perovskite structure was stabilized as a majority phase in superconducting Y2Ba5Cu7O20-δ’(F/Cl)δ‘ films epitaxially grown on SrTiO3(100). The new phase was formed via fluorination or chlorination introduced during the post-deposition O2 furnace anneal for recrystallization. The structure is determined by x-ray diffraction to be an orthorhombic unit cell [a∼b=3.86(1) Å, c=27.24(6) Å] with reflection conditions consistent with a fully twinned A-centered cell. Films containing primarily the new phase show a lower resistivity ρ(300 K)∼177 μΩ cm, a comparable ratio of ρ(300 K)/ρ(100 K)∼3.0, and a lower superconducting temperature of 78–74 K when compared to Y1Ba2Cu3O7.


Related Articles

  • CaNdAlO4 perovskite substrate for microwave and far-infrared applications of epitaxial high Tc superconducting thin films. Berkowski, M.; Pajaczkowska, A.; Gierl\owski, P.; Lewandowski, S. J.; Sobolewski, R.; Gorshunov, B. P.; Kozlov, G. V.; Lyudmirsky, D. B.; Sirotinsky, O. I.; Saltykov, P. A.; Soltner, H.; Poppe, U.; Buchal, Ch.; Lubig, A. // Applied Physics Letters;8/6/1990, Vol. 57 Issue 6, p632 

    Single-crystal perovskite calcium-neodymium aluminate CaNdAlO4 has been grown and tested as a substrate material for high Tc superconducting thin films. The material is chemically stable, can be fabricated into the form of large, twin-free wafers, permits deposition of epitaxial Y-Ba-Cu-O and...

  • Effect of spin-polarized injection on the mixed state of YBa[sub 2]Cu[sub 3]O[sub 7-δ]. Mikheenko, P.; Colclough, M. S.; Severac, C.; Chakalov, R.; Welhoffer, F.; Muirhead, C. M. // Applied Physics Letters;1/15/2001, Vol. 78 Issue 3, p356 

    We report measurements of the magnetic moment of YBa[sub 2]Cu[sub 3]O[sub 7-δ] films when subjected to injection of short pulses of spin-polarized current from the colossal magnetoresistance (CMR) manganites La[sub 0.7]Ca[sub 0.3]MnO[sub 3] and La[sub 0.7]Sr[sub 0.3]MnO[sub 3], and...

  • Low-loss substrate for epitaxial growth of high-temperature superconductor thin films. Simon, R. W.; Platt, C. E.; Lee, A. E.; Lee, G. S.; Daly, K. P.; Wire, M. S.; Luine, J. A.; Urbanik, M. // Applied Physics Letters;12/26/1988, Vol. 53 Issue 26, p2677 

    A perovskite-like single-crystal substrate material has been investigated that simultaneously permits epitaxial growth of 1-2-3 superconductor films and possesses desirable rf properties of low dielectric constant and loss tangent. The lattice constant of 3.792 Ã… provides a lattice match to...

  • Ion beam patterning of spin-on metalorganic precursors and formation of high Tc superconductors. Gross, M. E.; Brown, W. L.; DiCenzo, S. B.; Hartford, E. H.; Yeh, J. J.; Hong, M. // Applied Physics Letters;8/29/1988, Vol. 53 Issue 9, p802 

    A new technique using ion beams to produce patterned thin films of the high-temperature perovskite superconductor YBa2Cu3O7-x from spin-on metalorganic precursors is described. Spin-coated precursor films are irradiated through a stencil mask with 2.5 MeV He+ ions, developed in solvent to remove...

  • Structure, sound velocity, and thermal conductivity of the perovskite NdGaO[sub 3]. Krivchikov, A. I.; Gorodilov, B. Ya.; Kolobov, I. G.; Érenburg, A. I.; Savitskií, D. I.; Ubizskií, S. B.; Syvorotka, I. M.; Vasilechko, L. O. // Low Temperature Physics;May2000, Vol. 26 Issue 5 

    X-ray (300 K) and ultrasonic (77-270 K) studies and measurements of the thermal conductivity (30-300 K) are carried out on single-crystal samples of NdGaO[sub 3] in different crystallographic directions. The values of the lattice parameters of NdGaO[sub 3] are refined. The sound velocities in...

  • Atomic-scale observation of polarization switching in epitaxial ferroelectric thin films. Marasco, D. L.; Kazimirov, A.; Bedzyk, M. J.; Lee, T.-L.; Streiffer, S. K.; Auciello, O.; Bai, G.-R. // Applied Physics Letters;7/23/2001, Vol. 79 Issue 4 

    The thin-film x-ray standing wave (XSW) technique is used for an atomic-scale study of polarization switching in ferroelectric Pb(Zr[sub 0.3]Ti[sub 0.7])O[sub 3] (PZT)/electrode heterostructures grown on SrTiO[sub 3](001). The XSW is selectively generated in the PZT by the interference between...

  • Studies of film growth processes and surface structural characterization of ferroelectric memory-compatible SrBi2Ta2O9 layered perovskites via in situ, real-time ion-beam analysis. Auciello, O.; Krauss, A. R.; Im, J.; Gruen, D. M.; Irene, E. A.; Chang, R. P. H.; McGuire, G. E. // Applied Physics Letters;10/28/1996, Vol. 69 Issue 18, p2671 

    In situ, real-time studies of layered perovskite SrBi2Ta2O9 (SBT) film growth processes were performed using a time-of-flight ion scattering and recoil spectroscopy (TOF ISARS) technique. These studies revealed two important features related to the synthesis of SBT films via ion-beam...

  • Crystallization behavior of sol-gel derived Pb(Zr,Ti)O[sub 3] thin films and the polarization.... Amanuma, Kazushi; Hase, Takashi // Applied Physics Letters;12/12/1994, Vol. 65 Issue 24, p3140 

    Examines the microstructure of sol-gel derived Pb(Zr,Ti)O[sub 3] thin films. Use of Auger electron spectroscopy and transmission electron microscopy; Depth profile of the material resulting from crystallization into perovskite phase; Interface characteristics after 10[sub 8] polarization...

  • Preparation of perovskite conductive LaNiO[sub 3] films by metalorganic decomposition. Aidong Li; Chuanzhen Ge // Applied Physics Letters;3/4/1996, Vol. 68 Issue 10, p1347 

    Examines perovskite conductive LaNiO[sub 3] films by metalorganic decomposition. Use of rutherford backscattering spectrometry for film thickness; Detection of conductive LaNiO[sub 3] films at annealing temperature; Application of LaNiO[sub 3] for ferroelectric memory devices.


Read the Article


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

Try another library?
Sign out of this library

Other Topics