Current-controlled magnetic domain-wall nanowire shift register
- PMID: 18403706
- DOI: 10.1126/science.1154587
Current-controlled magnetic domain-wall nanowire shift register
Abstract
The controlled motion of a series of domain walls along magnetic nanowires using spin-polarized current pulses is the essential ingredient of the proposed magnetic racetrack memory, a new class of potential non-volatile storage-class memories. Using permalloy nanowires, we achieved the successive creation, motion, and detection of domain walls by using sequences of properly timed, nanosecond-long, spin-polarized current pulses. The cycle time for the writing and shifting of the domain walls was a few tens of nanoseconds. Our results illustrate the basic concept of a magnetic shift register that relies on the phenomenon of spin-momentum transfer to move series of closely spaced domain walls.
Comment in
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Applied physics. At mixed odds, racetrack memory charges from gate.Science. 2008 Apr 11;320(5873):166. doi: 10.1126/science.320.5873.166. Science. 2008. PMID: 18403683 No abstract available.
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