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Colloquium: Katherine Aidala, Mt. Holyoke College
Start Date: 2/7/2014Start Time: 12:45 PM
End Date: 2/7/2014End Time: 2:00 PM

Event Description:
Katherine Aidala
Department of Physics
Mount Holyoke College

"Manipulating Magnetic States in Nanorings: The future of data storage?"

Magnetic random access memory (MRAM) would combine the benefits of the hard drive (non-volatile, cheap, high density of bits) with the benefits of RAM (fast, mechanically robust). One proposal for MRAM involves the vortex state of nanorings, a state in which the magnetic moments align circumferentially in the clockwise or counterclockwise direction. For a symmetric ring in a uniform field, these states are energetically degenerate and cannot be selected experimentally. A circular field allows us to study the switching behavior between these vortex states. We have developed an experimental technique to apply a local circular field by passing current through the tip of an atomic force microscope. I will discuss how the atomic force microscope works, our experimental results demonstrating switching between the vortex states, and our understanding of the evolution of these states based on our simulations. We predict novel states that arise from both energy minimization and topological constraints.

The colloquium will begin promptly at 12:45 p.m. in Science Center 199.
A pizza lunch will be provided for those attending at 12:30 p.m.

Please check our website for any updates or changes:
Location Information:
*Swarthmore College - Science Center
Room: Science Center 199 - Cunniff Hall
Contact Information:
Name: Carolyn Warfel
Phone: 610-328-8258
Kathy Aidala
Open To
The Public

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