AFE-like Hysteresis Loops from Doped HfO2: Field Induced Phase Changes and Depolarization Fields
P.D. Lomenzo, C. Richter, M. Materano, T. Mikolajick, U. Schroeder, T. Schenk, D. Spirito, and S. Gorfman
in the proceedindgs of the Joint Conference of the IEEE International Frequency Control Symposium and IEEE International Symposium on Applications of Ferroelectrics, Virtual, Keystone, United States, 19-23 July 2020, art. no. 9234872, ISBN: 978-172816430-4, 2020
Most pristine doped HfO2 polarization-field hysteresis loops show a pinched hysteresis and discussions are ongoing to explain this AFE-like switching behavior. Main causes discussed in literature are related to field induced phase changes, depolarization fields from non-polar phase regions in ferroelectric HfO2, and trapped charge. Structural and electrical characterization results are compared to distinguish between the different causes of AFE-like hysteresis behavior.