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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Kent, A.D. |
| Copyright Year | 2005 |
| Description | Author affiliation: Dept. of Phys., New York Univ., NY, USA (Kent, A.D.) |
| Abstract | Summary form only given. Presents experiments on spin-transfer induced magnetization reversal and excitations in magnetic metallic nanopillars. For these studies, sub-micron lateral dimension (/spl sim/50 nm) pillar devices have been fabricated by means of a new nano-stencil mask process ideal for systematic variation of layer composition and thickness. The author addresses three aspects of the physics of spin-transfer: (A) The phase-diagram for magnetic switching in bilayer (Co/Cu/Co) nanopillars in large magnetic fields applied perpendicular to the plane of the layers; (B) Current-induced excitations in single cobalt ferromagnetic layer (Cu/Co/Cu) nanopillars (i.e., in structures without a fixed spin-polarizing magnetic reference layer); and (C) the dependence of the switching current on free magnetic layer thicknesses in bilayer structures. In the latter case, the thickness of a cobalt layer has been systematically varied from 0.5 to 4 nm. However, the slope of the switching current, dI/sub c//dH, is found to have only a weak dependence on this thickness at low temperature (4.2 K), in contrast to the linear thickness dependence expected in the original model of spin-transfer. The author discusses interpretations of this behavior, including the possible importance of spin-pumping induced magnetic damping in these ultra-thin free magnetic layers. |
| Sponsorship | Magnetics Soc. of Japan Magnetics Soc. of the IEEE |
| File Size | 111828 |
| File Format | |
| ISBN | 0780390091 |
| DOI | 10.1109/INTMAG.2005.1464216 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2005-04-04 |
| Publisher Place | Japan |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Nanoscale devices Sun Physics Magnetic switching Cobalt Magnetization reversal Magnetic fields Nanostructures Temperature dependence Damping |
| Content Type | Text |
| Resource Type | Article |
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