Background and activities

I am currently a PhD candidate in the FACET group, and have worked there since August of 2019.

Main supervisor: Professor Dennis Gerhard Meier

Co-supervisor: Professor Antonius T. J. van Helvoort

Research

My research focuses on studying the ferroelecric domains walls which display anomolous charge transport properties. Primarily, I am interested the hexagonal manganites, but other ferroelectrics such as lead germante and gadolynium molybdate are also of interest. Using a range of correlated microscopy techniques including Scanning Probe Microscopy (SPM), Focused Ion Beam (FIB), Transmission Electron Microscopy (TEM) and most importantly an Atom Probe Tomography (APT) instrument, the goal is to characterize the domain walls at the atomic level. Specifically, obtaining the chemical composition and the charge distribution surrounding the walls are the primary focus.

Background

Before my PhD position, I did my master's thesis at the TEM Gemini Centre here at NTNU, under the supervision of Professor Antonius T. J. van Helvoort, focusing on visualizing the ferroelectric domain structures of lead germante and erbium manganite by electron microscopy. The thesis was completed in June of 2019.

Scientific, academic and artistic work

Displaying a selection of activities. See all publications in the database

2020

2019

  • Hunnestad, Kasper Aas; Schultheiß, Jan; Holstad, Theodor S.; Van Helvoort, Antonius; Meier, Dennis. (2019) Nanoscale chemical mapping in 3D by atom probe tomography: Needle preparation. Norwegian Nanosymposium . Nano@NTNU; Trondheim. 2019-10-16 - 2019-10-18.
  • Hunnestad, Kasper Aas; Van Helvoort, Antonius. (2019) Visualizing Ferroelectric Domain Structures in ErMnO3 and Pb5Ge3O11 by Electron Microscopy. 2019.