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Title: Tuning frustrated pyrochlores
Author: Lindsay, Rebecca J.
Awarding Body: University of Kent
Current Institution: University of Kent
Date of Award: 2019
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Structural studies have been conducted on a series of β-pyrochlore materials using primarily X-ray and powder neutron diffraction techniques. Mössbauer Spectroscopy and SQUID (Superconducting Quantum Interference Device) magnetometer measurements have also been performed to determine the oxidation states of Fe and the magnetic behaviour of materials, respectively. Particular attention has been paid to the fluoride family exhibiting a general formula of AM2F6 which exhibit both charge order and disorder on the transition metal crystallographic site. A newly developed soft chemistry synthetic route for producing a novel cubic pyrochlore, FeF3, with true porosity is reported which could play an instrumental role in designing a new family of β-pyrochlore materials. Finally, this work reports a possible charge ordered AM2F6 material exhibiting conventional spin-glass like magnetic behaviour similar to reported materials.
Supervisor: Green, Mark A. Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available