Photoinduced enhancement of the c-axis conductivity in oxygen-deficient YBa2Cu3Ox thin films

W. Markowitsch; C. Stockinger; W. Lang; K. Bierleutgeb; J. D. Pedarnig; D. Bäuerle

doi:10.1063/1.119863

Photoinduced enhancement of the c-axis conductivity in oxygen-deficient YBa₂Cu₃O_x thin films

W. Markowitsch, C. Stockinger, W. Lang, K. Bierleutgeb, J. D. Pedarnig, D. Bäuerle

Electronic Properties of Materials

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

High quality thin films of oxygen-depleted YBa/sub 2/Cu/sub 3/O/sub x/ (x approximately=6.6) were prepared by pulsed-laser deposition on SrTiO/sub 3/ substrates that were cut with tilt angles of 10 degrees and 20 degrees with respect to the [001] direction, resulting in a steplike growth of the layers. The resistance showed a semiconducting behavior along the projection of the c axis to the film surface, but a metallic behavior in the perpendicular direction, indicating that the former is dominated by the c-axis resistivity and the latter by the ab-plane resistivity of YBa/sub 2/Cu/sub 3/O/sub x/. Long-term illumination of the samples with a 100 W halogen lamp resulted in a significant conductivity enhancement in both directions. The photoinduced change of the out-of-plane resistance vs temperature characteristics is comparable to the effect of large hydrostatic pressure, introducing structural changes similar to that of photoexcitation.

Original language	English
Pages (from-to)	1246-1248
Number of pages	3
Journal	Applied Physics Letters
Volume	71
DOIs	https://doi.org/10.1063/1.119863
Publication status	Published - 1997

Austrian Fields of Science 2012

503013 Subject didactics of natural sciences
103018 Materials physics

Keywords

barium-compounds; electrical-resistivity; high-temperature-superconductors; photoconductivity-; pulsed-laser-deposition; radiation-effects; stoichiometry-; superconducting-thin-films; yttrium-compounds photoinduced-enhancement; c-axis-conductivity; oxygen-deficient-YBa-sub-2-Cu-sub-3-O-sub-x-thin-films; high-quality-thin-films; oxygen-depleted-YBa-sub-2-Cu-sub-3-O-sub-x-; pulsed-laser-deposition; SrTiO-sub-3-substrates; tilt-angles; steplike-growth; semiconducting-behavior; metallic-behavior; perpendicular-direction; ab-plane-resistivity; long-term-illumination; photoinduced-change; out-of-plane-resistance; temperature-characteristics; structural-changes; photoexcitation-; 100-W; SrTiO-sub-3-; YBa-sub-2-Cu-sub-3-O-sub-7- A7475-Superconducting-films; A7470V-Perovskite-phase-superconductors; A7240-Photoconduction-and-photovoltaic-effects:-photodielectric-effects; A6480E-Stoichiometry-and-homogeneity; A8115I-Pulsed-laser-deposition; A6180B-Ultraviolet,-visible-and-infrared-radiation-effects

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Cite this

@article{0f321fc9931e43d5b23e069ad9b1e277,

title = "Photoinduced enhancement of the c-axis conductivity in oxygen-deficient YBa2Cu3Ox thin films",

abstract = "High quality thin films of oxygen-depleted YBa/sub 2/Cu/sub 3/O/sub x/ (x approximately=6.6) were prepared by pulsed-laser deposition on SrTiO/sub 3/ substrates that were cut with tilt angles of 10 degrees and 20 degrees with respect to the [001] direction, resulting in a steplike growth of the layers. The resistance showed a semiconducting behavior along the projection of the c axis to the film surface, but a metallic behavior in the perpendicular direction, indicating that the former is dominated by the c-axis resistivity and the latter by the ab-plane resistivity of YBa/sub 2/Cu/sub 3/O/sub x/. Long-term illumination of the samples with a 100 W halogen lamp resulted in a significant conductivity enhancement in both directions. The photoinduced change of the out-of-plane resistance vs temperature characteristics is comparable to the effect of large hydrostatic pressure, introducing structural changes similar to that of photoexcitation.",

keywords = "barium-compounds; electrical-resistivity; high-temperature-superconductors; photoconductivity-; pulsed-laser-deposition; radiation-effects; stoichiometry-; superconducting-thin-films; yttrium-compounds photoinduced-enhancement; c-axis-conductivity; oxygen-deficient-YBa-sub-2-Cu-sub-3-O-sub-x-thin-films; high-quality-thin-films; oxygen-depleted-YBa-sub-2-Cu-sub-3-O-sub-x-; pulsed-laser-deposition; SrTiO-sub-3-substrates; tilt-angles; steplike-growth; semiconducting-behavior; metallic-behavior; perpendicular-direction; ab-plane-resistivity; long-term-illumination; photoinduced-change; out-of-plane-resistance; temperature-characteristics; structural-changes; photoexcitation-; 100-W; SrTiO-sub-3-; YBa-sub-2-Cu-sub-3-O-sub-7- A7475-Superconducting-films; A7470V-Perovskite-phase-superconductors; A7240-Photoconduction-and-photovoltaic-effects:-photodielectric-effects; A6480E-Stoichiometry-and-homogeneity; A8115I-Pulsed-laser-deposition; A6180B-Ultraviolet,-visible-and-infrared-radiation-effects",

author = "W. Markowitsch and C. Stockinger and W. Lang and K. Bierleutgeb and Pedarnig, {J. D.} and D. B{\"a}uerle",

note = "M1 - 9 AIP USA Journal-Paper English 0003-6951",

year = "1997",

doi = "10.1063/1.119863",

language = "English",

volume = "71",

pages = "1246--1248",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

}

TY - JOUR

T1 - Photoinduced enhancement of the c-axis conductivity in oxygen-deficient YBa2Cu3Ox thin films

AU - Markowitsch, W.

AU - Stockinger, C.

AU - Lang, W.

AU - Bierleutgeb, K.

AU - Pedarnig, J. D.

AU - Bäuerle, D.

N1 - M1 - 9 AIP USA Journal-Paper English 0003-6951

PY - 1997

Y1 - 1997

N2 - High quality thin films of oxygen-depleted YBa/sub 2/Cu/sub 3/O/sub x/ (x approximately=6.6) were prepared by pulsed-laser deposition on SrTiO/sub 3/ substrates that were cut with tilt angles of 10 degrees and 20 degrees with respect to the [001] direction, resulting in a steplike growth of the layers. The resistance showed a semiconducting behavior along the projection of the c axis to the film surface, but a metallic behavior in the perpendicular direction, indicating that the former is dominated by the c-axis resistivity and the latter by the ab-plane resistivity of YBa/sub 2/Cu/sub 3/O/sub x/. Long-term illumination of the samples with a 100 W halogen lamp resulted in a significant conductivity enhancement in both directions. The photoinduced change of the out-of-plane resistance vs temperature characteristics is comparable to the effect of large hydrostatic pressure, introducing structural changes similar to that of photoexcitation.

AB - High quality thin films of oxygen-depleted YBa/sub 2/Cu/sub 3/O/sub x/ (x approximately=6.6) were prepared by pulsed-laser deposition on SrTiO/sub 3/ substrates that were cut with tilt angles of 10 degrees and 20 degrees with respect to the [001] direction, resulting in a steplike growth of the layers. The resistance showed a semiconducting behavior along the projection of the c axis to the film surface, but a metallic behavior in the perpendicular direction, indicating that the former is dominated by the c-axis resistivity and the latter by the ab-plane resistivity of YBa/sub 2/Cu/sub 3/O/sub x/. Long-term illumination of the samples with a 100 W halogen lamp resulted in a significant conductivity enhancement in both directions. The photoinduced change of the out-of-plane resistance vs temperature characteristics is comparable to the effect of large hydrostatic pressure, introducing structural changes similar to that of photoexcitation.

KW - barium-compounds; electrical-resistivity; high-temperature-superconductors; photoconductivity-; pulsed-laser-deposition; radiation-effects; stoichiometry-; superconducting-thin-films; yttrium-compounds photoinduced-enhancement; c-axis-conductivity; oxygen

U2 - 10.1063/1.119863

DO - 10.1063/1.119863

M3 - Article

SN - 0003-6951

VL - 71

SP - 1246

EP - 1248

JO - Applied Physics Letters

JF - Applied Physics Letters

ER -