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Creation of nanoscale magnetic fields using nano-magnet arrays

AIP Advances

Sapkota, Keshab R.; Eley, S.; Bussmann, Ezra; Harris, Charles T.; Maurer, Leon; Lu, Tzu M.

We present the fabrication of nano-magnet arrays, comprised of two sets of interleaving SmCo5 and Co nano-magnets, and the subsequent development and implementation of a protocol to program the array to create a one-dimensional rotating magnetic field. We designed the array based on the microstructural and magnetic properties of SmCo5 films annealed under different conditions, also presented here. Leveraging the extremely high contrast in coercivity between SmCo5 and Co, we applied a sequence of external magnetic fields to program the nano-magnet arrays into a configuration with alternating polarization, which based on simulations creates a rotating magnetic field in the vicinity of nano-magnets. Our proof-of-concept demonstration shows that complex, nanoscale magnetic fields can be synthesized through coercivity contrast of constituent magnetic materials and carefully designed sequences of programming magnetic fields.

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A resurgence in neuromorphic architectures enabling remote sensing computation

Proceedings - 2019 IEEE Space Computing Conference, SCC 2019

Vineyard, Craig M.; Severa, William M.; Kagie, Matthew J.; Scholand, Andrew J.; Hays, Park E.

Technological advances have enabled exponential growth in both sensor data collection, as well as computational processing. However, as a limiting factor, the transmission bandwidth in between a space-based sensor and a ground station processing center has not seen the same growth. A resolution to this bandwidth limitation is to move the processing to the sensor, but doing so faces size, weight, and power operational constraints. Different physical constraints on processor manufacturing are spurring a resurgence in neuromorphic approaches amenable to the space-based operational environment. Here we describe historical trends in computer architecture and the implications for neuromorphic computing, as well as give an overview of how remote sensing applications may be impacted by this emerging direction for computing.

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Results 2101–2150 of 9,998
Results 2101–2150 of 9,998