Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Hans Lengfellner"'
Publikováno v:
Applied Physics A. 99:717-722
Multilayer structures A–B–A⋅⋅⋅ consisting of alternating layers of a metal A and a semiconductor B can show large anisotropy in their transport properties. In tilted multilayer structures, where layer planes and sample surface include a non
Publikováno v:
Applied Physics A. 78:323-326
Thermoelectric fields transverse to an applied temperature gradient are observed in tilted metallic multilayer structures. Constantan–chromel multilayers are prepared by sintering stacks of alternating thin foils of these materials. Effective “in
Publikováno v:
Applied Physics A. 105:347-349
The transverse Seebeck effect in tilted metal-semiconductor multilayer structures has been exploited for electric power generation. In tilted Pb–Bi2Te3 multilayer samples, coefficients of performance for transverse thermoelectric power generation h
Autor:
A. Gramm, Hans Lengfellner, Dieter Bäuerle, R. Rössler, Th. Zahner, U. Spreitzer, Johannes D. Pedarnig
Publikováno v:
Europhysics Letters (EPL). 49:501-506
The anisotropy of the oxygen diffusion in the high-Tc-super con duc tor Bi2Sr2CaCu2O8 + δ was investigated using off–c-axis prepared thin films. High-quality oriented films with thickness 1000 A and c-axis inclined by a tilt angle α with respect
Publikováno v:
International Journal of Infrared and Millimeter Waves. 20:1103-1111
Thermoelectricity is investigated in a material designed to show anisotropic transport properties: Copper/constantan/copper \( \cdot \cdot \cdot \) multilayer structures were prepared by sintering of a compressed stack of alternating foils of these m
Publikováno v:
Journal of Low Temperature Physics. 117:651-655
Superconducting Bi 2 Sr 2 CaCu 2 O 8+δ thin films (T c ≃85K) were prepared on off-c-axis (001) SrTiO 3 substrates by pulsed laser deposition. High quality oriented film growth with a c-axis inclined with respect to the surface normal by a tilt ang
Autor:
Johannes D. Pedarnig, Hans Lengfellner, Dieter Bäuerle, Th. Zahner, R. Stierstorfer, R. Rössler
Publikováno v:
Physica C: Superconductivity. 298:91-94
Bi 2 Sr 2 CaCu 2 O 8 thin films were prepared on off- c -axis (001) SrTiO 3 substrates by pulsed-laser deposition. Oriented film growth, with a c -axis inclined with respect to the surface normal by a tilt angle α is found up to α ≃15° from SEM,
Autor:
Th. Zahner, Johannes D. Pedarnig, S. T. Li, R. Schreiner, R. Roessler, O. Kus, Hans Lengfellner, Dieter Bäuerle, R. Stierstorfer
Publikováno v:
Europhysics Letters (EPL). 40:673-678
The anisotropy ΔS of the thermopower in thin films of the high-Tc superconductor Bi2Sr2CaCu2O8 is investigated using off–c-axis epitaxial film growth and the off-diagonal Seebeck effect. The measurements represent a new method for the investigatio
Autor:
Hans Lengfellner, G. Schlaffer, Karl Friedrich Renk, Wilhelm Prettl, C. Oprea, K. Robl, O. Kus, B. Brunner
Publikováno v:
Physica C: Superconductivity. 249:333-338
A voltaic response upon pulsed laser irradiation was obtained from superconducting epitaxial YBa 2 Cu 3 O 7−δ films subjected to non-static magnetic fields. A model is proposed which relates the voltaic signals to a laser-induced change of the shi
Publikováno v:
Physical Review B. 51:11903-11908
We have measured the thermoelectric response of off-c-axis epitaxial ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{\ensuremath{\delta}}}$ films with thicknesses between 35 and 500 nm using laser pulses at uv an