SEMINAR: Physics Seminar

Current condensed-matter research strives for ever declining system sizes and faster probing techniques. This goes with the impressive capability of the controlled synthesis of materials allowing for new functionalities such as the control of magnetism with electric fields and vice versa. The appropriate theoretical models should thus be capable to capturing quantum and mesoscopic effects as well as the case of coupled order parameters such as field-driven multiferroics. In this talk I will summarize our studies of the field-driven, spin-dependent dynamics in nanostructures and how this dynamics can be accessed experimentally [1,2]. The transition to the classical treatment is then addressed as well as the question of how to optimally control the magnetization dynamics in metallic nanomagnets [3]. A further issue is how the polarization evolves for a ferroelectric oxide driven by an electric field and how to capture the coupled magnetization/polarization dynamics in multiferroic nanostructure in the presence of time-dependent electric and magnetic fields [4].

[1] A. Matos-Abiague, J. Berakdar, Phys. Rev. Lett. 94, 166801 (2005). [2] Y. Pavlyukh, J. Berakdar, Chem. Phys. Lett. 468, 313 (2009). [3] A. Sukhov, J. Berakdar, Phys. Rev. Lett. 102, 057204 (2009). [4] A. Sukhov, C. L. Jia, P. P. Horley and J. Berakdar, J. Phys.: Condens. Matter 22, 352201 (2010).