Hien Nguyen, PhD Candidate, UNSW
Epitaxial perovskite (P) and brownmillerite (BM) SrCo0.67Fe0.33O3−δ thin films grown on (100) SrTiO3 substrates by pulsed laser deposition are investigated by detailed X-ray diffraction, conductive AFM, and SQUID magnetometry measurements regarding their structural, electronic, and magnetic properties. A topotactic phase transition between P and BM phases can be utilized to oxidize the material to stoichiometric perovskite SrCoO3 by wet-chemical oxidation with NaClO. The material exhibits weak magnetic properties up to room temperature and an additional clear ferromagnetic transition near 50 K.
About the presenter
Hien Nguyen is a PhD candidate in materials science and engineering working with Prof Jan Seidel at UNSW Sydney, where she studies nanoscale properties of multiferroic materials and growth of atomically thin films by pulsed laser deposition on different substrates, and investigates electric, magnetic properties of these materials as well as phase transitions and topotactic transformations in complex oxides. This work falls within FLEET’s Enabling technology A: Atomically-thin materials.