Naturally Oxidized FeCo as a Magnetic Coupling Layer for Electrically Isolated Read/Write Paths in mLogic

作者：Sokalski Vincent^*; Bromberg David M; Morris Daniel; Moneck Matthew T; Yang En; Pileggi Larry; Zhu Jian Gang

来源：IEEE Transactions on Magnetics, 2013, 49(7): 4351-4354.

DOI：10.1109/TMAG.2013.2242446

• FeCoB
• FeCo-Oxide
• m Logic
• p-MTJ

Recently, a nonvolatile, low power circuit scheme based on current-induced domain wall motion and perpendicular magnetic tunnel junctions known as m Logic has been proposed that requires electrically isolated, magnetically coupled read and write paths. Here, we suggest naturally oxidized FeCo for the magnetic coupling layer. Relevant properties of the FeCo-oxide were evaluated by a preliminary investigation of [FeCo/FeCo - Oxide](N) artifical superlattices. It is found that FeCo thin films form an insulating 11 angstrom passivating oxide layer with a magnetization of 500 emu/cc. Experimental measurements show that FeCo-oxide can couple two perpendicular FeCoB layers with a coupling strength greater than 0.35 ergs/cm(2).

• 出版日期2013-7