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Structure/Property relationships in (RE) perovskites


Project Description

Perovskites are highly adaptable and flexible materials with many interesting and applicable electrical and magnetic properties, including lithium ion conductors, oxide ion conductors, GMR materials, superconductors and so on. One of the most famous systems of complex perovskites is YBa2Cu3O7, an oxygen-deficient triple perovskite and a high temperature superconductor.

Chemical substitutions did not yield any increase in the critical temperature of this material, but at the time the focus was very much on superconductivity. We are particularly interested in revisiting these materials to look at the other properties they may exhibit, and carrying out further substitutions to tailor the materials towards compatibility with other perovskite materials (such as the lanthanum gallates).

The project will focus on the synthesis of novel perovskites. The materials will be synthesised via conventional solid state chemistry techniques and analysed by powder X-ray and neutron diffraction, AC impedance, and thermogravimetric analysis.
There will also be the opportunity to attend conferences and training courses.

The successful candidate should have, or expect to have, an Honours Degree at 2.1 or above (or equivalent) in Chemistry.
Knowledge of solid state synthesis and X-ray diffraction would be highly desirable, but not essential.

Funding Notes

There is no funding attached to this project, it is for self-funded students only

References

J. M. S. Skakle and A. R. West: "Superconducting La1.5-xBa1.5+x-yCayCu3Oz Solid Solutions: (i) Phase Diagram, Cation Stoichiometry and Tc Data", Physica C, 220, 187-194 (1994)
J. M. S. Skakle and A. R. West: "Superconducting La1.5-xBa1.5+x-yCayCu3Oz Solid Solutions: (ii) Oxygen Content and Crystal Structure", Physica C, 227, 336-342 (1994)
J. M. S. Skakle and A. R. West: "Formation and Decomposition of LaBa2Cu3Oz", J. Mat. Chem., 4 [11] 1745-1748 (1994).
J. M. S. Skakle: “Crystal chemical substitutions and doping of YBa2Cu3Ox and related superconductors”, Mat. Sci. Eng: R: Reports, 23 1-40 (1998).

APPLICATION PROCEDURE:
This project is advertised in relation to the research areas of the discipline of Chemistry. Formal applications can be completed online: http://www.abdn.ac.uk/postgraduate/apply. You should apply for PhD in Chemistry, to ensure that your application is passed to the correct College for processing.NOTE CLEARLY THE NAME OF THE SUPERVISOR and EXACT PROJECT TITLE ON THE APPLICATION FORM. Applicants are limited to applying for a maximum of 2 projects. Any further applications received will be automatically withdrawn.

Informal inquiries can be made to Professor Skakle ([email protected]) with a copy of your curriculum vitae and cover letter. All general enquiries should be directed to the Graduate School Admissions Unit ([email protected]).

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