Dr. Julien Lombardi studied Multiferroic Transition Metal Oxides in the O'Brien research group. He specialized in gel collection synthesis and uses it to control doping concentrations of various transition metals into know perovskite systems such as BaTiO3 and KNbO3. His characterization expertise lies in transition electron microscopy, scanning electron microscopy, dielectric measurements, and x-ray powder diffraction. Julien is now working at a biotech startup.
Contact Info:
Email: jlombardi2@gradcenter.cuny.edu
TEM images of KNbO3, and KNbO3 with various doping concentrations of Ba and Ni, the resulting crystalline structure, known as KBNNO became more cubic in morphology with higher Ba and Ni concentrations.
Effective dielectric measurements of KNbO3 and KBNNO samples made into a 0-3 nanocomposite with poly-furfuryl alcohol. The data shows and increase in dielectric constant with increasing Ba and Ni concentrations.