University of Oxford Featured PhD Programmes
Birkbeck, University of London Featured PhD Programmes
University of Oxford Featured PhD Programmes
Dr T A Moore , Applications accepted all year round Competition Funded PhD Project (Students Worldwide)

About the Project

Magnetic random access memory (MRAM) using electrical current to switch magnetic layers has been on the market for around 4 years. It has the potential to replace much of the memory hierarchy in computer architectures but the device footprint and energy consumption are still too large to be competitive. To address the latter, there are several ongoing investigations into the use of electric field to manipulate nanomagnets, either by directly applying a gate voltage or indirectly via piezoelectric strain. Along with this has come an interest in the physics of interfaces of magnetic layers with other materials such as ferroelectrics, oxides and topological insulators.
In previous work we have pioneered the piezoelectric strain control of ultrathin ferromagnetic layers with perpendicular magnetization (relevant to perpendicular magnetic recording, for example), and we have begun to explore the influence of strain at the surface of ferroelectric barium titanate on the magnetic domain structures in adjacent ferromagnetic layers. The use of a single crystal ferroelectric enables larger strain to be generated at the interface where it is needed, in contrast to commercial piezoelectric stressors where the surfaces are too rough to deposit high quality magnetic layers. The aim of this project is to replace the ferromagnet with a ferrimagnet, which has a smaller net magnetization making it promising, for example, for fast and efficient read/write operations, and which in the right composition has a peculiar sensitivity to strain. Ferrimagnet/ferroelectric structures will be grown in the Royce deposition facility at the University of Leeds, which combines several thin film growth techniques in one system, and characterised using state-of-the-art instruments in the Condensed Matter group. The goal will be to control the magnetic properties of the ferrimagnet reversibly by applying a voltage to the ferroelectric. The choice of materials will be guided by the principle of sustainability, ensuring that they are plentiful, as defined by the European Chemical Society in 2019. This requirement is already met by the constituent elements of barium titanate and some ferrimagnets too.

Funding Notes

Please refer to the University of Leeds website for information on funding opportunities.

Email Now

Insert previous message below for editing? 
You haven’t included a message. Providing a specific message means universities will take your enquiry more seriously and helps them provide the information you need.
Why not add a message here

The information you submit to University of Leeds will only be used by them or their data partners to deal with your enquiry, according to their privacy notice. For more information on how we use and store your data, please read our privacy statement.

* required field

Your enquiry has been emailed successfully



Search Suggestions

Search Suggestions

Based on your current searches we recommend the following search filters.



FindAPhD. Copyright 2005-2020
All rights reserved.