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Tuning Frustrated Pyrochlores

Lindsay, Rebecca J (2019) Tuning Frustrated Pyrochlores. Doctor of Philosophy (PhD) thesis, University of Kent,. (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided)

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Abstract

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.

Item Type: Thesis (Doctor of Philosophy (PhD))
Thesis advisor: Green, Mark A
Uncontrolled keywords: pyrochlore, fluoride, magnetism, frustration, SQUID, porosity, hydrothermal, geometric
Divisions: Faculties > Sciences > School of Physical Sciences
SWORD Depositor: System Moodle
Depositing User: System Moodle
Date Deposited: 18 Mar 2019 17:05 UTC
Last Modified: 03 Jun 2019 09:34 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/73058 (The current URI for this page, for reference purposes)
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