Embedded Fe Nanoparticles in the MgO Layer of CoFeB/MgO/CoFeB Perpendicular Magnetic Tunnel Junctions

In this paper, we report the electric and magnetic effects after inserting Fe nanoparticles into the MgO layer of a Ta(25)/Co 20 Fe 60 B 20 (1.3)/MgO(1)/Fe(x)/MgO(1)/Co 40 Fe 40 B 20 (2.2)/Ta(5) structure. The samples were annealed at 300 °C without external magnetic field. Temperature dependence of...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2014-11, Vol.50 (11), p.1-3
Main Authors: Ye, Lin-Xiu, Lee, Ching-Ming, Chiou, Chui-Xiang, Chang, Yang-Hua, Chen, Wen-Jauh, Wu, Te-Ho
Format: Article
Language:English
Subjects:
Iron
Junctions
Magnetic tunneling
Magnetism
Nanoparticles
Perpendicular magnetic anisotropy
Temperature measurement
Tunneling magnetoresistance
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Summary:In this paper, we report the electric and magnetic effects after inserting Fe nanoparticles into the MgO layer of a Ta(25)/Co 20 Fe 60 B 20 (1.3)/MgO(1)/Fe(x)/MgO(1)/Co 40 Fe 40 B 20 (2.2)/Ta(5) structure. The samples were annealed at 300 °C without external magnetic field. Temperature dependence of resistivity and the anomalous Hall effect were used to infer the morphology of the Fe layer. With the addition of Fe nanoparticles, the optimal tunnel magnetoresistance ratio can be increased by up to 111.2%.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2014.2325399