Regensburg 2016 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 12: Postersession DS

DS 12.30: Poster

Montag, 7. März 2016, 17:00–19:00, Poster A

Thermal Transport of Phase Change Materials and related Chalcogenides — •Daniel Führen1, Matteo Cagnoni1, and Matthias Wuttig1,21I. Physikalisches Institut (IA), RWTH Aachen University, 52056 Aachen, Germany — 2JARA-FIT, RWTH Aachen University, Germany

Phase change materials (PCMs) are a unique class of materials combining interesting physical properties such as large electronic and optical contrast between the amorphous and crystalline states. One remarkable feature of those materials is the fast reversible switching between their states on a timescale of nanoseconds. This combination of properties is used to store information in rewritable optical data storage applications. The chalcogenide GeTe was the first investigated PCM which shows good optical contrast and fast recrystallization. Many compositions with Ge have been found as PCMs and are applied in commercial products like rewritable DVDs.

Thermal properties of materials play an important role for an efficient switching behavior between the two states. PCMs may be promising candidates for thermoelectric devices because of their specific characteristic of low thermal conductivity in the crystalline state. Here, we present thermal properties of phase change alloys measured between room temperature and 120 °C. The samples are produced as thin films via sputter deposition and are analyzed by 3-omega technique, which has a high accuracy and applicability in a large temperature range, to determine the thermal conductivity.

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DPG-Physik > DPG-Verhandlungen > 2016 > Regensburg