Berlin 2012 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 38: Poster III: Resistive switching (jointly with DF, KR, HL); Thermoelectric materials (Focused session); Micro- and nanopatterning (jointly with O); Ion irradiation effects

DS 38.19: Poster

Donnerstag, 29. März 2012, 17:30–19:00, Poster E

Investigation of the thermal conductivity of ZnO_1−xS_x thin films — •Florian Gather, Achim Kronenberger, Peter J. Klar, and Bruno K. Meyer — I. Physikalisches Institut, Justus-Liebig-University, Heinrich-Buff-Ring 16, 35392 Giessen

We investigated the thermal conductivity κ of rf-sputtered ZnO_1−xS_x thin films. For a reliable measurement of the thermal conductivity of thin films, the 3ω-method is supposed to yield the best results. Measurements, performed using a self-constructed 3ω measurement system, show a reduced κ of the ZnO_1−xS_x samples compared to bulk crystals. Using Raman spectroscopy we found indications for local phonon modes of oxygen in zinc-sulfide and sulphur in zinc-oxide, respectively. Presumably these local phonon modes cause the reduction of κ observed in the experiments.