TY - JOUR
T1 - Large photoinduced enhancement of the electrical anisotropy in semiconducting YBa2Cu3Ox
AU - Markovitsch, Wilhelm
AU - Stockinger, Christian
AU - Lang, Wolfgang
AU - Rössler, R
AU - Pedarnig, Johannes D.
AU - Bäuerle, Dieter
N1 - Zeitschrift: Physica C: Superconductivity and its Applications
DOI: 10.1016/S0921-4534(01)00903-0
Coden: PHYCE
Affiliations: Institut für Materialphysik, Universität Wien, Strudlhofgasse 4, A-1090 Wien, Austria
Adressen: Markowitsch, W.; Institut für Materialphysik; Universität Wien; Strudlhofgasse 4 A-1090 Wien, Austria; email: [email protected]
Import aus Scopus: 2-s2.0-0036467186
29.10.2007: Datenanforderung 1949 (Import Sachbearbeiter)
PY - 2002
Y1 - 2002
N2 - The impact of long-term light excitation on YBa2Cu3Ox (YBCO) (x≈6.4) thin films grown on “wedged” SrTiO3 substrates was studied at several temperatures between 50 and 275 K. From the anisotropic resistance of the films, the in-plane (ρab) and the out-of-plane (ρc) resistivities were calculated. The electrical anisotropy ρc/ρab increased substantially during the light excitation at all studied temperatures. At 50 K, an increase of more than a factor of two was observed, whereas at higher temperatures the increases were smaller. At 275 K, ρc/ρab showed a slightly falling tendency after about 1 h of illumination indicating oxygen ordering. The results strongly support our previously proposed two-mechanism picture of persistent photoconductivity in YBCO. Œ 2002 Elsevier Science B.V. All rights reserved.
AB - The impact of long-term light excitation on YBa2Cu3Ox (YBCO) (x≈6.4) thin films grown on “wedged” SrTiO3 substrates was studied at several temperatures between 50 and 275 K. From the anisotropic resistance of the films, the in-plane (ρab) and the out-of-plane (ρc) resistivities were calculated. The electrical anisotropy ρc/ρab increased substantially during the light excitation at all studied temperatures. At 50 K, an increase of more than a factor of two was observed, whereas at higher temperatures the increases were smaller. At 275 K, ρc/ρab showed a slightly falling tendency after about 1 h of illumination indicating oxygen ordering. The results strongly support our previously proposed two-mechanism picture of persistent photoconductivity in YBCO. Œ 2002 Elsevier Science B.V. All rights reserved.
U2 - 10.1016/S0921-4534(01)00903-0
DO - 10.1016/S0921-4534(01)00903-0
M3 - Article
SN - 0921-4534
VL - 366
SP - 277
EP - 282
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - 4
ER -