Event Scheduled for Feb 2, 2018
Event: MSE Seminar Speaker - Dr. Joshua Agar
Time: 09:45 am
Details of Event:
Materials Science and Engineering
Invites you to a seminar by
Dr. Joshua Agar
Postdoctoral Researcher, Department of Material Science and Engineering, University of California, Berkeley
Friday, February 2, 2018
Institute of Materials Science Building, Room 20, at 9:45 a.m.
Refreshments will be served at 9:30 a.m.
“Nanoscale Susceptibilities in Ferroelectric Thin Films: Insights from Multidimensional Spectroscopy and Machine Learning”
Abstract: Large susceptibilities in ferroelectrics depends on our ability to drive reconfiguration of the ferroic order parameter with externally-applied stimuli. Consequently, there is interest in understanding how ferroelectric order, at multiple length scales, responds under applied fields; and what this means for macroscopic properties. In recent years, in operando (e.g., piezoresponse force microscopy (PFM), transmission electron microscopy, etc.) capable of probing stimuli-driven changes in ferroelectric order at the appropriate length and time scales have become available. These approaches, however, have led to an orders-of-magnitude increase in the volume, variety, veracity, and velocity of the experimentally-generated data; rendering conventional analysis approaches untenable. Here, using multidimensional PFM spectroscopies we show how machine learning can bring physically-important phenomena concealed within “big” hyperspectral data into focus for interpretation. Specifically, we highlight how physically-guided featurization protocols in conjunction with machine learning and deep-learning neural networks can be applied to glean new insights regarding how nanoscale, 3d domain geometry can be exploited to enhance piezoelectric responses and electromechanical energy conversion.
Bio: Joshua C. Agar is a Postdoctoral Scholar in the Department of Materials Science and Engineering at the University of California, Berkeley. His research interests center around advanced complex oxide thin-film deposition, custom multidimensional electromechanical scanning probe microscopy, and the implementation of machine learning to glean scientific insight. Joshua earned a B.S. from the University of Illinois at Urbana-Champaign (2009), a M.S. from the Georgia Institute of Technology (2011) and a PhD from the University of Illinois at Urbana Champaign (2015) all in the field of Materials Science and Engineering. His work has been published and highlighted in a range of high impact journals across scientific disciplines including: Nature Materials, Advanced Materials, ACS Nano, Physical Review Letters, etc.
Target Audience: Not Available
Sponsored By: Materials Science and Engineering Department
No Pamphlet/Flyer Available