The Effects of Electrode and Annealing on CoFeB-MgO-TbFeCo Perpendicular Magnetic Tunnel Junctions

In this study, we report the effects of electrode and annealing on the magnetic properties of CoFeB-MgO-CoFeB-TbFeCo structures. The samples of structure bottom electrode/Co 20 Fe 60 B 20 (x nm)/MgO(1)/Co 20 Fe 60 B 20 (0 or 1 nm)/Tb2 3 (Fe 80 Co 20 ) 77 (5 nm)/top electrode were deposited on SiO 2...

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Veröffentlicht in:	IEEE transactions on magnetics 2012-11, Vol.48 (11), p.2820-2822
Hauptverfasser:	Ye, Lin-Xiu, Lee, Ching-Ming, Lee, Jia-Mou, Tseng, Wang-Ling, Wu, Te-ho
Format:	Artikel
Sprache:	eng
Schlagworte:	Annealing Coercive force Cross-disciplinary physics: materials science rheology Electrodes Exact sciences and technology Magnetic hysteresis Magnetic properties Magnetic tunnel junctions (MTJs) Magnetic tunneling Magnetism Materials science Other topics in materials science perpendicular magnetic anisotropy Physics rare-earth-transition metal Saturation magnetization
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Zusammenfassung:	In this study, we report the effects of electrode and annealing on the magnetic properties of CoFeB-MgO-CoFeB-TbFeCo structures. The samples of structure bottom electrode/Co 20 Fe 60 B 20 (x nm)/MgO(1)/Co 20 Fe 60 B 20 (0 or 1 nm)/Tb2 3 (Fe 80 Co 20 ) 77 (5 nm)/top electrode were deposited on SiO 2 substrates at room temperature. The structures were then annealed at the temperature ranging from 250 to 400°Cunder 5 kOe perpendicular applied field for two hours. We found that the magnetic properties of the CoFeB free layer depend on the electrode stack structures. The perpendicular magnetic easy axis of the CoFeB free layer can be maintained after annealing up to 400°C.
ISSN:	0018-9464 1941-0069
DOI:	10.1109/TMAG.2012.2198624