Description

2010/09/22, Nikolai Kiselev, IFW-Dresden, Germany

Place:  Sala de Seminarios del Departamento de Física Teórica e Historia de la Ciencia
Time: 12h.
Title: Magnetic ground state and magnetization reversal in synthetic metamagnets

Abstract
Antiferromagnetically coupled multilayers with perpendicular anisotropy (e.g. [Co/(Pt,Pd)]/Ru)  can be considered as synthetic metamagnets (SMs). The ground state in these systems strongly depends on the energy balance between the interlayer exchange and the dipolar interaction. Similar to bulk metamagnets, in SMs an applied magnetic field stabilizes unusual multidomain states that is metamagnetic domains.
In my talk I will present a comprehensive theoretical study of the ground state and magnetization reversal processes (MRP) in SMs. I will give a short introduction to the magnetic domain theory and detailed description of our model.
Theoretical and experimental studies revealed a rich variety of specific multidomain textures, including regular states and different types of topological magnetic defects. I will discuss peculiarities of MRP in dependence on the system parameters.