Please use this identifier to cite or link to this item:
Title: MRAM device incorporating single-layer switching via rashba-induced spin torque
Authors: Guo, J. 
Tan, S.G. 
Jalil, M.B.A. 
Eason, K.
Lua, S.Y.H.
Rachid, S.
Meng, H.
Keywords: Magnetic RAM (MRAM)
Rashba spin-orbit interaction
spin transfer torque (STT)
Issue Date: Oct-2011
Citation: Guo, J., Tan, S.G., Jalil, M.B.A., Eason, K., Lua, S.Y.H., Rachid, S., Meng, H. (2011-10). MRAM device incorporating single-layer switching via rashba-induced spin torque. IEEE Transactions on Magnetics 47 (10) : 3868-3871. ScholarBank@NUS Repository.
Abstract: We designed and modeled a nonvolatile memory device that utilizes the Rashba spin-orbit coupling (SOC) to write data onto a free ferromagnetic (FM) layer and uses the tunneling magnetoresistive (TMR) effect for data read-back. The magnetic RAM (MRAM) device consists of a free (switchable) FM multilayer stack, in which a large internal electric field is induced at the interfaces between the oxide and the FM layer. In the FM layer, data writing by magnetization switching occurs via the Rashba-induced spin torque, while the data reading process in the system could be fulfilled via the current-perpendicular-to-plane TMR response. A general equation of motion for the local moments has been obtained by formally deriving the SU(2) spin-orbit gauge field arising due to SOC and the critical current density is estimated to be 1.2× 108 A/cm2. Micromagnetic simulations were performed to demonstrate the Rashba-induced switching mechanism. By choosing or fabricating alloys with a lower magnetocrystalline anisotropy and enhancing the Rashba coupling strength via surface or interfacial engineering, the critical current may be further reduced to well below 107 A/cm2, a level that may enable the practical realization of a single-layer Rashba-induced magnetization switching memory. © 2011 IEEE.
Source Title: IEEE Transactions on Magnetics
ISSN: 00189464
DOI: 10.1109/TMAG.2011.2158634
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Mar 22, 2023


checked on Mar 22, 2023

Page view(s)

checked on Mar 16, 2023

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.