Magnetoelectric coupling in multiferroic FeVO 4 Gavin Lawes, Wayne State University, DMR 0644823

1. Magnetoelectric coupling in multiferroic FeVO4Gavin Lawes, Wayne State University, DMR 0644823 The coexistance of magnetic and ferroelectric properties in multiferroic materials provides a striking example of how multiple types of order can develop in the same phase. However, the coupling between these two properties remains poorly understood. We have investigated the coupling between magnetism and ferroelectricity, magnetoelectric coupling, in the recently identified multiferroic FeVO4. By considering both bi-quadratic and trilinear terms coupling magnetization and polarization in the free energy, we are able to model the multiferroic transition in FeVO4 along with other features in the dielectric response. A. Dixit. G. Lawes, A.B. Harris, Physical Review B 82, 024430 (2010). TN Dielectric constant of FeVO4 as a function of temperature. The dashed line represents the contribution from bi-quadratic magnetoelectric coupling, while the jump at the antiferromagnetic ordering transition arises from trilinear magnetoelectric contributions.

2. Magnetoelectric coupling in multiferroic FeVO4Gavin Lawes, Wayne State University, DMR 0644823 Randomization times for simulations of magnetic nanoparticles on different lattices (Mohamed). • Notable broader impact activities for the past academic year include: • Technical presentation on the biomedical applications of magnetic nanoparticles at Dearborn Center for Math, Science, and Technology in May 2010. • Supervised two high school students, Mariam Mohamed and Rebecca Weaver, working on simulations of magnetic nanoparticles (Mohamed) and spintronic thin films (Weaver). Magnetoresistive effects associated with magnetic nanoparticles embedded in ZnO thin film (Weaver).