3D Visualization of Ferroic Nanostructures

  • We aim to understand how the energy landscape of nanoscaleferroicmaterials can be influenced through geometric patterning or confinement and through interfacial interactions. We aim to explore and control the formation of novel distributions of spin and charge, for example stable topological spin structures in nanoscalemagnetic disks, magnetic monopole defects in artificial spin ices, as well as flux-closure and metastable domains in ferroelectric nanostructures. Further degrees of freedom and novel functionality can be achieved in heterostructuresby interfacing materials with different ferroicorder.
  • In a second thrust we will explore how confinement and charged defects affect the charge transport behavior in resistance switching oxides, by visualizing the 3D distribution of conducting filaments and by creating artificial resistance switching networks.
  • Our approach involves a combination of aberration-corrected Lorentz transmission electron microscopy and advanced scanning force microscopy that we use to address the scientific questions related to ferroicnanostructure behavior and resistance switching oxides. A particular focus is the use of three-dimensional analysis and imaging techniques that we have developed to visualize domain and transport behavior in nanostructures as a function of external stimuli such as applied fields, temperature and time.