Electrostatic modulation of the electronic properties of Nb-doped SrTiO[sub 3] superconducting films

Takahashi, K. S.; Matthey, D.; Jaccard, D.; Triscone, J. -M.; Shibuya, K.; Ohnishi, T.; Lippmaa, M.
March 2004
Applied Physics Letters;3/8/2004, Vol. 84 Issue 10, p1722
Academic Journal
We have performed ferroelectric field effect experiments using an epitaxial heterostructure composed of ferroelectric Pb(Zr[sub 0.2]Ti[sub 0.8])O[sub 3] and superconducting Nb-doped SrTiO[sub 3]. The films were prepared on (001) SrTiO[sub 3] substrates by off-axis radio-frequency magnetron sputtering and pulsed-laser deposition. By switching the polarization field of the 500-Å-thick Pb(Zr[sub 0.2]Ti[sub 0.8])O[sub 3] layer, a large change of about 30% in resistivity and a 20% shift of T[sub c] (ΔT[sub c]∼0.05 K) were induced in the 400-Å-thick epitaxial Nb-doped SrTiO[sub 3] layer. The relationship between T[sub c] and the electrostatically modulated average carrier concentration can be mapped onto the phase diagram of chemically doped SrTiO[sub 3]. © 2004 American Institute of Physics.


Related Articles

  • Processing and on-wafer test of ferroelectric film microwave varactors. Kim, J.-Y.; Grishin, A. M. // Applied Physics Letters;5/8/2006, Vol. 88 Issue 19, p192905 

    We present comparative characteristics of microwave variable capacitors (varactors) fabricated on Na0.5K0.5NbO3 (NKN), AgTa0.5Nb0.5O3 (ATN), and Ba0.5Sr0.5TiO3 (BST) ferroelectric films grown by rf-magnetron sputtering (NKN) and pulsed laser deposition (ATN and BST) techniques on the sapphire....

  • Observation of Higher Suppression of Superconducting Transition Temperature in YBaCuO/LaSrCoO as Compared to YBaCuO/LaSrMnO Bilayers. Samal, D.; Kumar, P. S. Anil // Journal of Superconductivity & Novel Magnetism;Feb2011, Vol. 24 Issue 1/2, p915 

    We report the experimental investigations of the suppression of superconductivity due to the pair breaking effect induced by ferromagnetic layer in YBaCuO/LaSrCoO and YBaCuO/LaSrMnO bi-layers fabricated by pulsed laser deposition. The current dependent electrical transport studies in the...

  • Quantification of resputtering during pulsed laser deposition. Sturm, Kai; Krebs, Hans-Ulrich // Journal of Applied Physics;7/15/2001, Vol. 90 Issue 2, p1061 

    During pulsed laser deposition in ultrahigh vacuum, the deposited material consists of a large fraction of ions with kinetic energies in the range of 100 eV. In many cases, these energetic particles induce resputtering at the film surface and lead to composition deviations. For Fe–Ag the...

  • Laser modification of silver nanoclusters in SiO2 thin films. Sendova-Vassileva, M.; Sendova, M.; Troutt, A. // Applied Physics A: Materials Science & Processing;Sep2005, Vol. 81 Issue 4, p871 

    Thin films of silica containing silver nanoclusters have been deposited by magnetron co-sputtering followed by thermal annealing. Laser modification of the mean cluster size was performed using the fourth harmonic of a Nd:YAG laser with energies of between 35 and 125 mJ/cm2. The mean size of the...

  • Preparation and substrate reactions of superconducting Y-Ba-Cu-O films. Gurvitch, M.; Fiory, A. T. // Applied Physics Letters;9/28/1987, Vol. 51 Issue 13, p1027 

    Multiple metal-target dc magnetron sputter deposition of a metallic YBa2Cu3 alloy in pure Ar followed by ex situ oxygen annealing was used to prepare superconducting films on various substrates. This work particularly examines film-substrate reactions which are degrading to superconductivity....

  • Reliable single-target sputtering process for high-temperature superconducting films and devices. Sandstrom, R. L.; Gallagher, W. J.; Dinger, T. R.; Koch, R. H.; Laibowitz, R. B.; Kleinsasser, A. W.; Gambino, R. J.; Bumble, B.; Chisholm, M. F. // Applied Physics Letters;8/1/1988, Vol. 53 Issue 5, p444 

    We report a simple, single-target magnetron sputtering process for films of high-temperature superconductors involving an off-axis sputtering geometry. The process lends itself both to film growth with high-temperature post-anneals and to low-temperature in situ film growth. The post-anneal...

  • Enhanced superconducting properties in ultrathin YBa[sub 2]Cu[sub 3]O[sub 7--delta] layers. Norton, David P.; Lowndes, Douglas H. // Applied Physics Letters;9/6/1993, Vol. 63 Issue 10, p1432 

    Enhances superconducting properties of ultrathin YBa[sub 2]Cu[sub 3]O[sub 7-delta] (YBCO) layers. Growth of YBCO structures using pulsed laser deposition; Observation of superconducting transition in a two unit cell thick YBCO layer; Use of reflection high energy electron diffraction in...

  • Pulsed-laser deposition of smooth high-T[sub c] superconducting films using a synchronous.... Pechen, E.V.; Varlashkin, A.V. // Applied Physics Letters;4/24/1995, Vol. 66 Issue 17, p2292 

    Describes the pulsed laser deposition of smooth high-temperature superconducting films using synchronous velocity filtration of plasma particles. Removal of particle droplets from laser-induced plasma using a shutter technique; Reduction of droplet density; Measurement of spatial distribution...

  • High-temperature superconductor Josephson junctions with a gradient Pr-doped.... Jia, Q.X.; Wu, X.D. // Applied Physics Letters;11/28/1994, Vol. 65 Issue 22, p2866 

    Fabricates high-temperature superconductor YBa[sub 2]Cu[sub 3]O[sub 7-delta] superconducting-normal-superconducting Josephson junctions using a pulsed laser deposition technique. Manifestation of the gradient doping; Confirmation of x-ray diffraction and Rutherford backscattering on good growth...


Read the Article


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

Try another library?
Sign out of this library

Other Topics