Study of an order-disorder phase transition on an atomic scale: the example of decagonal Al-Ni-Co quasicrystals.
In the present paper we succeeded in studying structural phase transitions from an atomistic point of view by positron annihilation Doppler broadening. This differs and is complementary to conventionally used diffraction experiments with large coherence lengths. In the exemplary case of the 1140 K order-disorder transition in decagonal Al71.5Ni14Co14.5 quasicrystals the importance of this atomistic approach and its wide scope of application is demonstrated.
Sato
K
K
Institut für Theoretische und Angewandte Physik, Universität Stuttgart, Pfaffenwaldring 57/VI, D-70550 Stuttgart, Germany.
Baier
F
F
Sprengel
W
W
Würschum
R
R
Schaefer
H-E
HE