Title :
A Dual Free Layer Sensor With Side Shields
Author :
Tuggle, Andrew ; Gider, Savas ; Mauri, Daniele ; Ho, Michael
Abstract :
We use a hybrid finite element code to explore the design space of a dual free layer (or trilayer) magnetic sensor to understand the effect of the stripe height (SH) to track width (TW) ratio on the bias point, as well as the noise. Transfer curves and noise properties are found to be strongly sensitive to the SH/TW ratio compared to a standard single free layer sensor. Side shields can change the eigenmodes of the coupled system and modify the noise cancellation.
Keywords :
eigenvalues and eigenfunctions; finite element analysis; magnetic sensors; SH-TW ratio effect; bias point; dual free layer magnetic sensor; eigenmodes; hybrid finite element code; noise cancellation; side shields; standard single free layer sensor; Couplings; Magnetic noise; Magnetic separation; Magnetic shielding; Magnetostatics; Noise cancellation; Dual free layer sensor; magnetic recording; magnetic sensors; nanoscale devices; trilayer sensor;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2012.2200034
