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Research Abstracts Online
January - December 2011

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University of Minnesota Twin Cities
College of Science and Engineering
Department of Electrical and Computer Engineering

PI: Randall H. Victora, Fellow

Simulation of Magnetic Materials and Systems

This group's efforts in computational magnetism include both micromagnetics (the calculation of domains and macroscopic behavior from nanometer-scale properties) and electronic structure, particularly the calculation of spin transport. They primarily apply these to problems in magnetic recording, such as characterization of perpendicular recording media, design of sense heads for very high density, and optimization of write heads for narrow track widths. This is directed towards helping the magnetic recording industry transition beyond 1 Terabit/inch2, where new technologies such as bit patterned media, heat assisted magnetic recording, or two-dimensional readback will be needed. These researchers have previously written several codes that are useful for this purpose, including an electron scattering code that is able to include more than 10,000 atoms and a million-element micromagnetic simulator that is suitable for treating an entire recording head including the area distant from the pole tip. These codes greatly benefit from use of the supercomputers owing to their unusual computational intensity.

Group Members

Pin-Wei Huang, Graduate Student
Tao Qu, Graduate Student
Hweerin Sohn, Graduate Student