Jonathan Z. Sun, Christopher Safranski
J Magn Magn Mater
We report on a numerical study of the micromagnetic switching process of a nanostructured spin torque device. We show that incoherent spin waves can be excited over a wide range of current and field even at zero temperature. These large amplitude, incoherent, and nonzero k spin wave modes are shown to alter the switching phase boundary from that calculated within a macrospin model. The presence of telegraphic transitions between different spin wave modes may also contribute to the so-called back-hopping phenomenon where the switching probability varies nonmonotonically with increasing bias current. © 2011 American Institute of Physics.
Jonathan Z. Sun, Christopher Safranski
J Magn Magn Mater
D. Bedau, H. Liu, et al.
Applied Physics Letters
Luqiao Liu, Ching-Tzu Chen, et al.
Nature Physics
Jonathan Z. Sun, R.P. Robertazzi, et al.
Physical Review B - CMMP