Formation of thin superconducting films by the laser processing method

Narayan, J.; Biunno, N.; Singh, R.; Holland, O. W.; Auciello, O.
November 1987
Applied Physics Letters;11/30/1987, Vol. 51 Issue 22, p1845
Academic Journal
We have prepared thin films of Y-Ba-Cu-O superconductors using a pulsed laser evaporation technique. Thin films were formed on (100) Si, (100) MgO, (1102) sapphire, (100) SrTiO3, and amorphous SiO2 substrates using a XeCl excimer laser (λ=0.308 μm, τ=45×10-9 s). The depositions were done in an ultrahigh vacuum chamber with pressure of about 10-6 Torr during thin-film formation. The deposition by pulsed nanosecond laser irradiation results in stoichiometry close to that of the target. The thickness of the film was controlled by varying the pulse energy density and the number of pulses. The substrate temperature was kept at 470 °C during deposition. Subsequent annealing treatments were carried out at 900 and 650 °C in oxygen atmosphere to recover the superconducting properties of these thin films. The resistance of these films was measured as a function of temperature using the four-point probe method. These thin films were analyzed using cross-section transmission electron microscopy, Rutherford backscattering spectrometry, and channeling techniques. The variation in the oxygen content and the interdiffusion of species into the substrate during subsequent annealing treatments are discussed.


Related Articles

  • Spatial imaging of the critical current density in epitaxial Y1Ba2Cu3O7 films. Gross, R.; Hipler, K.; Mannhart, J.; Huebener, R. P.; Chaudhari, P.; Dimos, D.; Tsuei, C. C.; Schubert, J.; Poppe, U. // Applied Physics Letters;11/13/1989, Vol. 55 Issue 20, p2132 

    We report the first spatially resolved measurement of the critical transport current density of c-axis oriented epitaxial Y1Ba2Cu3O7 films on <100> SrTiO3 using low-temperature scanning electron microscopy (LTSEM). The local critical current density, imaged with a spatial resolution of ∼1...

  • Growth of Ultrathin YBa[sub 2]Cu[sub 3]O[sub 7 – ][sub x] Films on the SrTiO[sub 3] Substrate. Gol’man, E. K.; Il’in, R. N.; Plotkin, D. A.; Razumov, S. V.; Sakharov, V. I.; Serenkov, I. T. // Physics of the Solid State;Mar2000, Vol. 42 Issue 3, p406 

    The growth of ultrathin (1.7-7.3 nm)YBa[sub 2]Cu[sub 3]O[sub 7-x] films on the SrTiO[sub 3](100) substrate is investigated by the mean-energy ion scattering technique. It is found that the growth of islands proceeds according to the two-dimensional and three-dimensional models and depends on the...

  • Superheating of YBa[sub 2]Cu[sub 3]O[sub 7-x] thin-film microbridges. Matyunina, O. V.; Pogrebnyakov, A. V. // Technical Physics Letters;Jun97, Vol. 23 Issue 6, p478 

    It is found that the hysteresis that develops with decreasing temperature in the current-voltage characteristics of thin-film YBa[sub 2]Cu[sub 3]O[sub 7-x] microbridges is due to superheating of the bridges by the transport current. The heat transport coefficient is determined to be...

  • Photoelectron spectra of thin films of the high-T[sub c] superconductor YBa[sub 2]Cu[sub 3]O[sub 7-δ]. Likhachev, E. R.; Kurganskiı, S. I.; Dubrovskiı, O. I.; Bugakov, A. M. // Physics of the Solid State;Mar97, Vol. 39 Issue 3, p378 

    The results of calculations of the energy band structure of thin films are used to obtain theoretical photoelectron spectra of the valence band of the compound YBa[sub 2]Cu[sub 3]O[sub 7-δ] for δ=0 and δ=1 at various photon energies; the spectra are averaged over the photoelectron...

  • A broadband method for the measurement of the surface impedance of thin films at microwave frequencies. Booth, J. C.; Wu, Dong Ho; Anlage, Steven M. // Review of Scientific Instruments;Jun94, Vol. 65 Issue 6, p2082 

    We present a new technique to measure the complex surface impedance of the mixed state of superconducting thin films over the broad frequency range 45 MHz-20 GHz. The surface impedance is extracted from measurements of the complex reflection coefficient made on the film using a vector network...

  • Magnetotransport Properties of GdBa[sub 2]Cu[sub 3]O[sub 7 - δ] Superconducting Thin Films. Roa-Rojas, J.; Téllez, D. A. Landínez; Prieto, P. // Surface Review & Letters;Oct-Dec2002, Vol. 9 Issue 5/6, p1791 

    Systematic measurements of the Hall and longitudinal resistivities as a function of temperature in GdBa[sub 2]Cu[sub 3]O[sub 7-δ] thin films were effectuated. These were performed in magnetic fields B = 0, 1, 2, 3, 4 and 5 T, applied perpendicular to the transport current orientation. Films...

  • Surface Topography on Epitaxial HoBa[sub 2]Cu[sub 3]O[sub 7-δ] and Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8+δ] Thin Films. Lopera, W.; Giratá, D.; Pérez, F.; Castro, L. F.; Baca, E.; Prieto, P.; Mendoza, A. // Surface Review & Letters;Oct-Dec2002, Vol. 9 Issue 5/6, p1729 

    Surface topography on epitaxial HoBa[sub 2]Cu[sub 3]O[sub 7-δ] (HBCO) and Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8+δ] (BSCCO) thin films analysis by using the atomic force microscopy (AFM) technique was carried out. The films were deposited in situ on SrTiO[sub 3] substrates with thicknesses...

  • Preparation of NdBa2Cu3O7-δ films in ultrahigh vacuum with a NO2 supersonic molecular beam. Nonaka, Hidehiko; Shimizu, Takashi; Arai, Kazuo // Applied Physics Letters;12/24/1990, Vol. 57 Issue 26, p2850 

    Superconducting NdBa2Cu3O7-δ thin films have been prepared in ultrahigh vacuum by the molecular beam epitaxy (MBE) method using a supersonic molecular beam of nitrogen dioxide as an oxidizing agent. A new type of supersonic molecular beam source has been developed, which has a liquid nitrogen...

  • Patterned YBa2Cu3O7-x thin films from photopolymerizable precursors. Hung, Yann; Agostinelli, John A. // Applied Physics Letters;12/31/1990, Vol. 57 Issue 27, p2945 

    A technique which combines the fabrication and patterning of thin films of the high Tc superconductor YBa2Cu3O7-x has been developed. The technique possesses the essential features of the metalorganic decomposition method with the additional attribute that the metalorganic precursor is...


Read the Article


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

Try another library?
Sign out of this library

Other Topics