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CAMP Seminar: Manipulating magnetic textures at the nanoscale: Probing a dynamic magnetic landscape

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Jesse Berezovsky, Case Western University
When
05 December 2017 from 3:30 PM to 4:30 PM
Where
339 Davey Laboratory
Contact Name
Jie Shan
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In conventional electronics, information is stored and processed by moving electrons from place to place. Virtually all of our modern technology takes advantage of the fact that electron motion can be conveniently controlled on nanosecond timescales with nanometer-scale precision by applying strong, local electric fields. Recently there has been growing interest in performing information storage and processing functions by controlling the spin of the electrons – so-called spintronics. A central obstacle impeding practical spintronics is the need for fast, local, strong (effective) magnetic fields to operate on the electron spins. We have been exploring how nanoscale magnetic textures can be manipulated to engineer dynamic magnetic landscapes for potential applications in spintronics, magnetic recording, or quantum information devices. Soft ferromagnetic films patterned into disks or nanowires can exhibit a single vortex magnetization state, with the vortex core position controllable by small magnetic fields or electrical currents. The vortex core produces a dipole-like magnetic field, with strength approaching 1 T at the surface of the film. I will discuss recent work in which we control vortex motion with high precision and on fast timescales, and probe the resulting dynamics using a combination of magneto-optical microscopy and single spin sensing. These dynamic magnetic textures are then used in turn to address and control individual coherent spins in diamond.

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