Events Calendar

Mork Family Department of Chemical Engineering and Materials Science Seminar - - Lyman L. Handy Colloquia

Speaker: Professor R. Ramesh, Department of Physics and Department of Materials Science and Engineering , University of California, Berkeley

Talk Title: Electric Field Control of Magnetism

Abstract: Complex perovskite oxides exhibit a rich spectrum of functional responses, including magnetism, ferroelectricity, highly correlated electron behavior, superconductivity, etc. The basic materials physics of such materials provide the ideal playground for interdisciplinary scientific exploration with an eye towards real applications. Over the past decade the oxide community has been exploring the science of such materials as crystals and in thin film form by creating epitaxial heterostructures and nanostructures. Among the large number of materials systems, there exists a small set of materials which exhibit multiple order parameters; these are known as multiferroics, particularly, the coexistence of ferroelectricity and some form of ordered magnetism (typically antiferromagnetism). The scientific community has been able to demonstrate electric field control of both antiferromagnetism and ferromagnetism at room temperature. Current work is focused on ultralow energy (1 attoJoule/operation) electric field manipulation of magnetism as the backbone for the next generation of ultralow power electronics. In this lecture, I will describe our progress to date on this exciting possibility. The lecture will conclude with a summary of where the future research is going.
References: 1. S. Manipatruni et al. Nature 565, 35 2019. 2. Heron, J. T. et al. Nature 516, 370 (2014).


Biography: Professor Ramesh graduated from the UC Berkeley in 1987. His pioneering research is in multiferroic oxides and he continues to pursue key scientific problems in complex multifunctional oxide thin films, nanostructures and heterostructures at Berkeley. His group demonstrated several critical steps towards the next generation of ultralow power storage and spintronics devices. He is highly cited (over 65,000 citations, H-factor =110). He has received the APS David Adler Lectureship award and the James McGroddy Prize, the TMS Bardeen Prize and the 2018 IUPAP Magnetism Prize and Neel Medal. In 2014, he was recognized as a Thomson-Reuters Citation Laureate in Physics for his work on multiferroics. From December 2010 to August 2012 he served as the Founding Director of the SunShot Initiative at the Department of Energy, overseeing and coordinating the R&D activities and funding (300M$/year) of the U.S. Solar Program. In 2011, he was elected to the National Academy of Engineering.

Location: John Stauffer Science Lecture Hall (SLH) - 200

Audiences: Everyone Is Invited

Contact: Karen Woo/Mork Family