A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2006; you can also visit the original URL.
The file type is application/pdf.
Bipolar high-field excitations inCo∕Cu∕Conanopillars
2005
Physical Review B
Preserved Fulltext
Other Versions
Current-induced magnetic excitations in Co/Cu/Co bilayer nanopillars (∼50 nm in diameter) have been studied experimentally at low temperatures for large applied fields perpendicular to the layers. At sufficiently high current densities excitations, which lead to a decrease in differential resistance, are observed for both current polarities. Such bipolar excitations are not expected in a single domain model of spin-transfer. We propose that at high current densities strong asymmetries in the
doi:10.1103/physrevb.71.140403
fatcat:l6acsfp3zfbt3h3cnbdles5pbe