Time: 3:00 PM, Fri, April 20
Place: Sumwalt 120A (Nanocenter, small conference room)

Speaker: Andrew Kunz
(Physics Department, Marquette University, Milwaukee, WI)

Title: Fast Control of Domain Wall Motion in Ferromagnetic Nanowires

Spintronic devices exploit the spin of the electron and its associated
magnetic moment to sense, transport and store information. Recently there
has been a particular interest in developing devices that depend on the
magnetic properties of long, thin wires where the information is encoded by
the transition between two magnetic domains. This transition region, called
a domain wall, can be moved changing the value. Controlling the motion of
the domain wall is essential for realizing new fast, high-density
non-volatile data storage devices. We use a combination of computer
simulation and some simple classical models to investigate techniques for
improving control from domain wall creation to final positioning.  The
presentation will focus mostly on our results but experimental verification
will be presented along with some recent results showing how defects can be
used to improve control.