Title :
Embedded Fe Nanoparticles in the MgO Layer of CoFeB/MgO/CoFeB Perpendicular Magnetic Tunnel Junctions
Author :
Lin-Xiu Ye ; Ching-Ming Lee ; Chui-Xiang Chiou ; Yang-Hua Chang ; Wen-Jauh Chen ; Te-Ho Wu
Author_Institution :
Taiwan SPIN Res. Center, Nat. Yunlin Univ. of Sci. & Technol., Douliou, Taiwan
Abstract :
In this paper, we report the electric and magnetic effects after inserting Fe nanoparticles into the MgO layer of a Ta(25)/Co20Fe60B20(1.3)/MgO(1)/Fe(x)/MgO(1)/Co40Fe40B20(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%.
Keywords :
Hall effect; annealing; boron alloys; cobalt alloys; iron alloys; magnesium compounds; nanoparticles; perpendicular magnetic anisotropy; tunnelling magnetoresistance; CoFeB-MgO-CoFeB; annealing; anomalous Hall effect; embedded iron nanoparticles; perpendicular magnetic anisotropy; perpendicular magnetic tunnel junctions; resistivity; temperature 300 degC; tunnel magnetoresistance ratio; Iron; Junctions; Magnetic tunneling; Nanoparticles; Perpendicular magnetic anisotropy; Temperature measurement; Tunneling magnetoresistance; Magnetic tunnel junctions (MTJs); perpendicular magnetic anisotropy (PMA);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2325399
