Skip to main content

Terahertz magnon control

PGR-P-1953

Key facts

Type of research degree
PhD
Application deadline
Monday 10 June 2024
Project start date
Tuesday 1 October 2024
Country eligibility
UK only
Funding
Funded
Source of funding
Doctoral training partnership
Supervisors
Dr Joshua Freeman
Additional supervisors
Dr Joseph Barker (Physics & Astronomy)
Schools
School of Electronic and Electrical Engineering, School of Physics and Astronomy
<h2 class="heading hide-accessible">Summary</h2>

A magnon is a collective excitation of spins in a magnetic material and can be characterised as a spin wave. These spin-waves are likely to play an important role in next-generation spintronics and magnetic data storage. Among the magnetic materials that support magnons, anti-ferromagnets are particularly interesting because they support magnons at high frequencies, in the terahertz range. In this project you will investigate, both theoretically and experimentally, how narrow linewidth terahertz lasers can be used to study and control high frequency magnons in antiferromagnets.

<h2 class="heading hide-accessible">Full description</h2>

<p>A magnon is a collective excitation of spins in a magnetic material and can be characterised as a spin wave. These spin-waves are likely to play an important role in next-generation spintronics and magnetic data storage.</p> <p>Among the magnetic materials that support magnons, anti-ferromagnets and newly discovered altermagnets are particularly interesting because they support magnons at high frequencies, in the terahertz range. These high frequency magnons are attractive for future highspeed spintronic devices because of their predicted rapid switching speeds. Another attractive feature for future applications is that these materials do not produce, or couple to external fields, despite being strongly ordered on the atomic level.</p> <p>To-date, most work studying magnons at these frequencies have used visible and near infrared lasers indirectly to excite and measure magnons. In this project you will investigate, both theoretically and experimentally, how narrow linewidth terahertz lasers can be used to study and control high frequency magnons in antiferromagnets.</p> <p>This project, a collaboration between Physics and Electrical Engineering at Leeds, builds on the strengths that exist in theory and simulation of magnetic materials (Physics) and Terahertz devices (Electrical engineering).</p> <p>The successful candidate will develop theory and simulation to describe the interaction of THz light with magnons. They will also devise device designs to enhance or control this coupling. Furthermore, as part of the project you will design and carry out experiments to demonstrate coupling of narrowband terahertz with Magnons.</p>

<h2 class="heading">How to apply</h2>

<p style="text-align:start; margin-bottom:24px">Formal applications for research degree study should be made online through the&nbsp;<a href="https://www.leeds.ac.uk/research-applying/doc/applying-research-degrees">University&#39;s website</a>. Please state clearly in the Planned Course for Study section that you are applying for&nbsp;<em><strong>EPSRC DTP Engineering &amp; Physical Sciences</strong></em>, in the research information section&nbsp;that the research degree you wish to be considered for is&nbsp;<strong><em>Terahertz magnon control</em></strong>&nbsp;as well as <a href="https://eps.leeds.ac.uk/electronic-engineering/staff/622/dr-joshua-freeman">Dr Joshua Freeman</a> as your proposed supervisor and&nbsp;<em><strong>in the Finance section, please state that the funding source you are applying for is EPSRC Quantum Technologies&nbsp;Doctoral Training Studentship</strong></em>.</p> <p>If English is not your first language, you must provide evidence that you meet the University&#39;s minimum English language requirements (below).</p> <p>As an international research-intensive university, we welcome students from all walks of life and from across the world. We foster an inclusive environment where all can flourish and prosper, and we are proud of our strong commitment to student education. Across all Faculties we are dedicated to diversifying our community and we welcome the unique contributions that individuals can bring, and particularly encourage applications from, but not limited to Black, Asian, people who belong to a minority ethnic community, people who identify as LGBT+ and people with disabilities. Applicants will always be selected based on merit and ability.</p> <p>Applications will be considered on an ongoing basis. &nbsp;Potential applicants are strongly encouraged to contact the supervisors for an informal discussion before making a formal application. &nbsp;We also advise that you apply at the earliest opportunity as the application and selection process may close early, should we receive a sufficient number of applications or that a suitable candidate is appointed.</p> <p>Please note that you must provide the following documents at the point you submit your application:</p> <ul> <li>Full Transcripts of all degree study or if in final year of study, full transcripts to date</li> <li>Personal Statement outlining your interest in the project</li> <li>CV</li> </ul>

<h2 class="heading heading--sm">Entry requirements</h2>

Applicants to research degree programmes should normally have at least a first class or an upper second class British Bachelors Honours degree (or equivalent) in an appropriate discipline. The criteria for entry for some research degrees may be higher, for example, several faculties, also require a Masters degree. Applicants are advised to check with the relevant School prior to making an application. Applicants who are uncertain about the requirements for a particular research degree are advised to contact the School or Graduate School prior to making an application.

<h2 class="heading heading--sm">English language requirements</h2>

The minimum English language entry requirement for research postgraduate research study is an IELTS of 6.0 overall with at least 5.5 in each component (reading, writing, listening and speaking) or equivalent. The test must be dated within two years of the start date of the course in order to be valid. Some schools and faculties have a higher requirement.

<h2 class="heading">Funding on offer</h2>

<p>A highly competitive EPSRC Quantum Technologies Doctoral Training Partnership Studentship offering the award of fees, together with a tax-free maintenance grant of &pound;19,237 per year for 3.5 years.&nbsp; Training and support will also be provided.<br /> <br /> This opportunity is open to UK applicants only.<br /> <br /> Please refer to the&nbsp;<a href="https://www.ukcisa.org.uk/">UKCISA</a>&nbsp;website for&nbsp;information regarding Fee Status for Non-UK Nationals.</p>

<h2 class="heading">Contact details</h2>

<p>For further information regarding your application, please contact Doctoral College Admissions by email to&nbsp;<a href="mailto:phd@engineering.leeds.ac.uk">phd@engineering.leeds.ac.uk</a></p> <p>For further information regarding this project, please contact Dr Joshua Freeman by email to <a href="mailto:J.R.Freeman@leeds.ac.uk">J.R.Freeman@leeds.ac.uk</a>.</p> <p>For information about Quantum Technologies or the Bragg Centre for Materials Research, please email&nbsp;<a href="mailto:BraggCentre@leeds.ac.uk">BraggCentre@leeds.ac.uk</a>.</p>


<h3 class="heading heading--sm">Linked funding opportunities</h3>