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Novel Route to Composite Multiferroics (physics)

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  • Full or part time
    Dr S Ladak
    Prof Oliver Williams
  • Application Deadline
    No more applications being accepted
  • Competition Funded PhD Project (European/UK Students Only)
    Competition Funded PhD Project (European/UK Students Only)

Project Description

Multiferroic materials are those that exhibit simultaneous ferroelectric, piezoelectric and ferromagnetic properties. These materials offer the exciting possibility of cross coupling between electric and magnetic orders, a process known as magneto-electrical coupling. This coupling enables the control of ferroelectric polarisation with magnetic field and conversely the manipulation of magnetisation with electric field. Such coupling allows the exciting possibility of new solid-state memories whereby the magnetisation of each element can be controlled using a voltage, rather than a spatially extended magnetic field. Single-phase multiferroic materials do exist but they are
haunted by low ordering temperatures and low coupling coefficients.
Composite multiferroics combine ferromagnetic and ferroelectric materials and exploit mechanical coupling between the two phases in order to produce a magnetoelectric effect. To date, only low values of magnetoelectric coupling have been observed in nanostructured materials. Recent advances in lithography processes allow the creation of 3D nanostructures of arbitrary geometry. Here at Cardiff, we have recently installed a cutting-edge 3D lithography system capable of producing 3D templates at a resolution of 200nm [2]. The student on this project will use this system along with other deposition technologies in order to fabricate novel three-dimensional multiferroic structures. The research will create a new class of multiferroic metamaterials whereby the individual magnetic and electrical properties can be tuned by altering the materials used, as well as by changing the 3D geometry/interface of each component. Samples will be subject to standard structural characterisation such as atomic force microscopy and scanning electron microscopy as well as magnetic and electrical characterisation.

Funding Notes

This project is available to students applying for a funded PhD studentship from this supervisor only and may be altered or withdrawn.
The available funding covers tuition fees at the UK/EU rate and stipend for eligible UK and EU students.
Number of studentships (across all projects): 1
This project is also available to students able to self-fund. Applicants will also be considered for MPhil study if requested.

How good is research at Cardiff University in Physics?

FTE Category A staff submitted: 19.50

Research output data provided by the Research Excellence Framework (REF)

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