Journal
PHYSICAL REVIEW LETTERS
Volume 104, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.167205
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Funding
- NSF [DMR-0748810, ECCS-0701458]
- Nanoelectronics Research Initiative through the Western Institute of Nanoelectronics
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We show that spin transfer torque from a direct spin-polarized current applied parallel to a magnetic domain wall (DW) induces DW motion in a direction independent of the current polarity. This unidirectional response of the DW to spin torque enables DW pumping-long-range DW displacement driven by an alternating current. Our numerical simulations reveal that DW pumping can be resonantly amplified through excitation of internal degrees of freedom of the DW by the current.
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