Tuesday May 12 Lunch Keynote: 12:30pm – 2:00pm
"Computing with Field-Coupled Nanomagnets"
Professor Wolfgang Porod, University of Notre Dame, USA
Magnetic phenomena are commonly used for data-storage applications, but there are relatively few attempts to exploit magnetic phenomena for logic applications. In this presentation, we review our recent work on logic functionality in systems of physically-coupled nanometer-scale magnets. Nanomagnets are special in that they exhibit only two distinct stable states of magnetization, which is the basis for their use in magnetic random access memories and in hard disk drives. These latter applications, for which fabrication of dense arrays is under development, face the challenge of avoiding magnetic dipole interactions between individual elements, which limits data storage density. In contrast, these interactions are exploited in the magnetic quantum-dot cellular automata (MQCA) system, which is a network of closely-spaced, dipole-coupled, single-domain nanomagnets designed for digital computation. Our work demonstrates that logic functions can be realized in properly-structured arrays of physically-coupled nanomagnets, and points to the possibility of all-magnetic information processing systems that incorporate both memory and logic.
Wolfgang Porod currently is Frank M. Freimann Professor of Electrical Engineering at the University of Notre Dame. He received his Diplom (M.S.) and Ph.D. degrees from the University of Graz, Austria, in 1979 and 1981, respectively. After appointments as a postdoctoral fellow at Colorado State University and as a senior research analyst at Arizona State University, he joined the University of Notre Dame in 1986 as an Associate Professor. He now also serves as the Director of Notre Dame’s Center for Nano Science and Technology. His research interests are in the area of nanoelectronics, with an emphasis on new circuit concepts for novel devices. He has authored some 300 publications and presentations. He is a Fellow of the IEEE and he has served (2002-2003) as the Vice President for Publications on the IEEE Nanotechnology Council. He also has been appointed an Associate Editor for the IEEE Transactions on Nanotechnology (2001-2005). He is a Founding Member of the IEEE Circuits and Systems Society’s Technical Committee on Nanoelectronics and Gigascale Systems, and he has been active in organizing Special Sessions and Tutorials, and as a speaker in IEEE Distinguished Lecturer Programs.