Project

Multi-scale 3D phase-field modelling of ferroelectric domain dynamics

Publisher

Supervisor

Location

Greater Copenhagen area

Ferroelectric materials are an unsung hero of modern technology; their ability to store charge and convert between electrical and mechanical work (i.e. piezoelectricity) makes them key to many technologies from high-speed digital memory to ultra-precise actuators. But regardless of their application, the final properties of the ferroelectric ultimately depends on the arrangement of the electric domains (regions of parallel electrical polarization), and their subsequent dynamics when subjected to stresses and electric fields during use. The challenge is understanding the domain wall dynamics, which involves complex 3D interactions over several length scales and cannot be accurately modelled using atomic-scale simulation tools.

The aim of this project is to model the collective dynamics of ferroelectric domain walls using a different approach: phase-field modelling. This type of model uses a thermodynamic description of the material to model the local response which, when implemented into a finite-element framework, can model the global response as well. The project will develop a robust framework for phase-field modelling using the COMSOL finite element package. This will be a significant step forward in terms of flexibility and versatility for phase-field modelling, and will enable studies of domain dynamics under complex boundary conditions, such as in porous ferroelectrics for ultrasound applications and defect-containing materials for digital memories.

The project will be carried out in the groups of Hugh Simons (NEXMAP) and Henrik Bruus (FLUIDS), and would suit a student with an interest in mathematics, modelling and solid state physics
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Contact

Company / Organization

DTU Fysik

Name

Hugh Simons

Position

Adjunkt

Mail

husimo@fysik.dtu.dk

Supervisor info

BSc in Physics and Nanotechnology

Supervisor

Hugh Simons

Co-supervisors

Henrik Bruus

Type

BSc project, MSc thesis

MSc in Materials and Manufacturing Engineering

Supervisor

Hugh Simons

Co-supervisors

Henrik Bruus

Type

BSc project, MSc thesis

MSc in Physics and Nanotechnology

Supervisor

Hugh Simons

Co-supervisors

Henrik Bruus

Type

BSc project, MSc thesis

Technical University of Denmark

For almost two centuries DTU, Technical University of Denmark, has been dedicated to fulfilling the vision of H.C. Ørsted – the father of electromagnetism – who founded the university in 1829 to develop and create value using the natural sciences and the technical sciences to benefit society.


Today, DTU is ranked as one of the foremost technical universities in Europe, continues to set new records in the number of publications, and persistently increases and develops our partnerships with industry, and assignments accomplished by DTU’s public sector consultancy.

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