Abstract
Using electron transmission diffraction, we studied the structure and morphology of thin N2O films of different effective thickness σ, quench condensed at temperaturesTd from 10 to 30 K. The respective phase diagram of morphologic states in the coordinates (σ, Td) was constructed. Unlike other cryocrystals, N2O shows an unusual ability to form (meta)stable purely amorphous or substantially amorphized crystalline states. The shape of the “phase line” that separates the amorphous and crystalline states is a cupola rather than the usual smooth step. The shape and size of the domain of amorphous states is controlled by heat removal conditions. The amorphous states become absolutely unstable at a temperature close to 40 K.
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