Neutron diffraction study on the structural phase transition in GeTe
T Chattopadhyay; J X Boucherle; H G vonSchnering; T Chattopadhyay; DRF/SPh-MDN, CEN, Grenoble, France; J X Boucherle; DRF/SPh-MDN, CEN, Grenoble, France; H G vonSchnering; DRF/SPh-MDN, CEN, Grenoble, France
Журнал:
Journal of Physics C: Solid State Physics
Дата:
1987-04-10
Аннотация:
The structural phase transition in GeTe has been investigated by neutron diffraction in the temperature range 295-716 K. Accurate positional and thermal parameters have been obtained as a function of temperature both in the rhombohedral hR2 phase(binary analogue of grey arsenic structure A7) and in the cubic CF8 phase (NaCl-type, B1). The temperature variation of the rhombohedral distortion and the relative shifts of the Ge and Te substructures show that the structural phase transition in GeTe is a displacive type.
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