Domain wall creation in nanostructures driven by a spin-polarized current |
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Authors: | Ravelosona D Mangin S Lemaho Y Katine J A Terris B D Fullerton Eric E |
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Institution: | Hitachi Global Storage Technologies, San Jose Research Center, 650 Harry Road, San Jose, California 95120, USA. |
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Abstract: | We report on current-driven magnetization reversal in nanopillars with elements having perpendicular magnetic anisotropy. Whereas only the two uniform magnetization states are available under the action of a magnetic field, we observed current-induced Bloch domain walls in pillars as small as 50 x 100 nm(2). This domain wall state can be further controlled by current to restore the uniform states. The ability to nucleate and manipulate domain walls by a current gives insight into the reversal mechanisms of small nanoelements and provides new prospects for ultrahigh density spintronic devices. |
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