[HTML][HTML] Thick CoFeB with perpendicular magnetic anisotropy in CoFeB-MgO based magnetic tunnel junction
We have investigated the effect of an ultra-thin Ta insertion in the CoFeB (CoFeB/Ta/CoFeB)
free layer (FL) on magnetic and tunneling magnetoresistance (TMR) properties of a CoFeB-
MgO system with perpendicular magnetic anisotropy (PMA). It is found that the critical
thickness (tc) to sustain PMA is doubled (tc= 2.6 nm) in Ta-inserted CoFeB FL as compared
to single CoFeB layer (tc= 1.3 nm). While the effective magnetic anisotropy is found to
increase with Ta insertion, the saturation magnetization showed a slight reduction. As the …
free layer (FL) on magnetic and tunneling magnetoresistance (TMR) properties of a CoFeB-
MgO system with perpendicular magnetic anisotropy (PMA). It is found that the critical
thickness (tc) to sustain PMA is doubled (tc= 2.6 nm) in Ta-inserted CoFeB FL as compared
to single CoFeB layer (tc= 1.3 nm). While the effective magnetic anisotropy is found to
increase with Ta insertion, the saturation magnetization showed a slight reduction. As the …
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