Journal
ACS NANO
Volume 6, Issue 5, Pages 3712-3717Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn3000143
Keywords
magnetic-vortex network; vortex gyration; signal transfer; logic operation; XOR
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Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science, and Technology [20120000236]
- Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, U.S. Department of Energy [DE-AC02-05-CH11231]
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Logic operations based on coupled magnetic vortices were experimentally demonstrated. We utilized a simple chain structure consisting of three physically separated but dipolar-coupled vortex-state Permalloy disks as well as two electrodes for application of the logical inputs. We directly monitored the vortex gyrations in the middle disk, as the logical output, by time-resolved full-field soft X-ray microscopy measurements. By manipulating the relative polarization configurations of both end disks, two different logic operations are programmable: the XOR operation for the parallel polarization and the OR operation for the antiparallel polarization. This work paves the way for new-type programmable logic gates based on the coupled vortex-gyration dynamics achievable in vortex-state networks. The advantages are as follows: a low-power input signal by means of resonant vortex excitation, low-energy dissipation during signal transportation by selection of low-damping materials, and a simple patterned-array structure.
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