Using Disorder or Liquid Electrolyte Gating to Design and Control Magnetic and Electronic Properties of Materials

Picture of Julie Karel

11 am
INRIM, Conference Room

Julie Karel
Department of Materials Science and Engineering
Monash University
Clayton, Victoria, Australia



Many research efforts, particularly in spintronics, are directed towards developing methods to modify or realize new materials properties. Some effective tools for doing this include introduction of disorder and application of electric fields; I will highlight examples of these from my own work during this talk.

First, I will show that application of an electric field through a liquid electrolyte gate produces significant, non-volatile and reversible modifications in the electronic structure of transition metal oxides. More specifically, I will explain the origin of the low temperature metallicity in VO2 and WO3 thin films after liquid electrolyte gating and offer some perspectives to utilize this technique in tuning magnetic properties of thin films.

The second part of the talk will demonstrate that disorder can be used to tune the magnetic and electronic properties in FexSi1-x thin films; amorphous thin films exhibit an enhanced magnetic moment, enhanced spin polarization and large anomalous Hall effect in comparison to the crystalline material with the same composition. These results will be shown to be linked directly to the local atomic structure.

Finally, I will discuss potential applications for amorphous materials in emerging spintronic devices.

Last modified: 08/30/2018 - 16:01