Abstract
Vapour-deposited phases in the Ni-Te system show interesting properties after annealing. Pulse-annealed thin films of NiTe 2 alloy show the presence of an ordered cubic phase with the lattice parameter a = 0.74 nm (temperature approximately 473 K). On further annealing (temperature approximately 513 K) this ordered structure transforms to a long-period phase and finally a highly disordered structure results. All these transformations are of an irreversible nature. The mechanism of these transformations and the nature of the disorder will be discussed.
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