Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-05-26
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
6 pages, 4 figures
Scientific paper
10.1103/PhysRevB.70.184438
We present a method to measure the effective field contribution to spin-transfer-induced interactions between the magnetic layers in a trilayer nanostructure, which enables spin-current effects to be distinguished from the usual charge-current-induced magnetic fields. This technique is demonstrated on submicron Co/Cu/Co nanopillars. The hysteresis loop of one of the magnetic layers in the trilayer is measured as a function of current while the direction of magnetization of the other layer is kept fixed, first in one direction and then in the opposite direction. These measurements show a current-dependent shift of the hysteresis loop which, based on the symmetry of the magnetic response, we associate with spin-transfer. The observed loop-shift with applied current at room temperature is reduced in measurements at 4.2 K. We interprete these results both in terms of a spin-current dependent effective activation barrier for magnetization reversal and a spin-current dependent effective magnetic field. From data at 4.2 K we estimate the magnitude of the spin-transfer induced effective field to be $\sim 1.5 \times 10^{-7} $ Oe cm$^2$/A, about a factor of 5 less than the spin-transfer torque.
Chen Wei
Kent Andrew D.
Koch Robert H.
Özyilmaz Barbaros
Rooks Michael J.
No associations
LandOfFree
Current-Induced Effective Magnetic Fields in Co/Cu/Co Nanopillars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Current-Induced Effective Magnetic Fields in Co/Cu/Co Nanopillars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current-Induced Effective Magnetic Fields in Co/Cu/Co Nanopillars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-78762