Date of Award
1-1981
Degree Type
Thesis
Degree Name
Doctor of Philosophy (PhD)
Department
Chemistry
Supervisor
J.E. Greedan
Abstract
The magnetic susceptibilities of α and β-Li₂Eu₅O₈ powders have been measured. These compounds have ferromagnetic interactions within a chain of Eu²⁺ ions and antiferromagnetic interactions between the chains. The interactions between the chains are very weak and both compounds can be considered to be nearly ideal examples of one dimensional ferromagnets.
No three-dimensional ordering was observed in VTa₂O₆ down to a temperature of 10K, contrary to the observation of TN = 24K by Bernier (6). The critical temperature which Bernier observed was probably due to a two-dImensional ordering.
The atomic parameters for VTa₂O₆ calculated from the powder neutron data, compare well with the atomic parameters of other trirutiles.
Recommended Citation
Nyokong, Tebello, "The Magnetic Properties of α and β-Li₂Eu₅O₈ and Neutron Diffraction of VTa₂O₆" (1981). Open Access Dissertations and Theses. Paper 3634.
http://digitalcommons.mcmaster.ca/opendissertations/3634