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Cross-section images of a sample in the (a) as-deposited and (b) hexagonal close packed phases taken by scanning electron microscope.
(Color online) Effective thermal conductivity of vs temperature for (a) and (b) and films. The dashed lines indicate the phase transition temperatures. The arrows show the temperature hysteresis due to phase change, measured by ramping the temperature back to room temperature after heating to 150 and, subsequently, to .
(Color online) Effective thermal conductivity at of six stoichiometric compounds in the as-deposited phase and after annealing at for . Compounds are produced by cosputtering with GeTe. and the two compounds closest in stoichiometry crystallized during annealing, leading to larger values of thermal conductivity. Scanning electron microscopy images show thicknesses of the as-deposited samples vary between 235 and .
Measured compositions, targeted cosputter fraction of , thicknesses, and phase transition temperatures for the six stoichiometric compounds.
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