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MM: Fachverband Metall- und Materialphysik
MM 18: Poster Session I
MM 18.7: Poster
Montag, 16. März 2020, 18:15–20:00, P4
Optical testing of phase change materials — •Simon von Oehsen, Maximilian Müller, Christoph Persch, and Matthias Wuttig — I. Institute of Physics (IA), RWTH Aachen University, Aachen, 52074, Germany
Faster switching enables advances in information storage. The well established phase change materials have proven to be a promising candidate to increase the switching speed of non-volatile memory. Yet, after over two decades of research its kinetics are still not fully understood.
The phase change optical tester (POT) provides the possibilty to measure the reflectivity change during crystal growth in real time over 8 orders of magnitude down to 10−8 s. The sample temperature can be tuned by an underlying heater and a laser, whose different heating parameters open up a variety of measures to study phase transformations. It allows the examination of as-deposited material as well as melt-quenched systems. Many phase change compounds are continuously being studied this way.
The power of the employed laser is yet to be transformed to a temperature by simulation and calibration to the heater or differential scanning calorimetry in order to better access, compare and process the data in the well known time-temperature-transition (TTT) diagram.