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Vortex polarity switching by a spin-polarized current | | Jean-Guy Caputo
; Yuri Gaididei
; Franz G Mertens
; Denis D Sheka
; | | Date: |
2 Feb 2007 | | Journal: | Phys Rev Lett, 98 (5), 056604 | | Abstract: | The spin-transfer effect is investigated for the vortex state of a magnetic nanodot. A spin current is shown to act similarly to an effective magnetic field perpendicular to the nanodot. Then a vortex with magnetization (polarity) parallel to the current polarization is energetically favorable. Following a simple energy analysis and using direct spin-lattice simulations, we predict the polarity switching of a vortex. For magnetic storage devices, an electric current is more effective to switch the polarity of a vortex in a nanodot than the magnetic field. | | Source: | PubMed, pmid17358881 | | Services: | Forum | Review | Favorites | |
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