University of Minnesota
School of Physics & Astronomy
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Jianping Wang

Magnetic read sensor with perpendicular anisotropy
Y.F. Ding, J. Judy and J. P. Wang, IEEE TRANSACTIONS ON MAGNETICS, 41, 707 (2005)

Download from DOI:10.1109/TMAG.2004.839069


A new read sensor design is proposed in attempt to solve the magnetization distribution and thermal stability problems for nano-meter scale read sensors. In this design the free layer has a perpendicular-to-plane easy axis and the reference layer has an in-plane easy axis. Giant magnetoresistance (GMR) film with this structure is demonstrated in which the free layer is a [CoFe/Pt]×n multilayer. The structure of [CoFe/Pt]×n multilayer has to be optimized so that the magnetic properties of the free layer can meet the requirement of a MR reader.