About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Mesoscale Phenomena in Functional Polycrystals and Their Nanostructures
|
| Presentation Title |
Coupled Multiferroic Phase Field Models for BiFeO3: Domain Topologies and Order Parameter Dynamics |
| Author(s) |
John Mangeri |
| On-Site Speaker (Planned) |
John Mangeri |
| Abstract Scope |
BiFeO3 has garnered significant interest because of its remarkable room temperature multiferroic properties. It has been proposed as an integral component of magnetoelectric spin-orbit logic devices which would form the backbone of next-generation information processing. Leveraging the open-source finite element framework MOOSE, we have developed a continuum-based approach that couples the Landau-Ginzburg theory of the ferroelectric phase transition along with the Landau-Lifshitz-Gilbert equation which governs micromagnetism. The model parameters are all derived from first-principles calculations whether directly or indirectly. This developed coarse-grained method is capable of simulating both the magnetic spins and the structural distortions in a single simulation on length and time scales not accessible to atomistic approaches. I will present results of electric-field driven switching of the polar and antiferromagnetic order parameters along with calculations of spin-wave transport across different domain wall topologies.
**Funding from the European Union's research programme (H2020-EU.1.3.2.) under Marie Sklodowska-Curie grant agreement SCALES-897614 |