Magnetic sensing device including a sense enhancing layer

Details Magnetic sensing device including a sense enhancing layer Magnetic sensing device including a sense enhancing layer

2011-04-19

2011-04-19

Renner, Craig A. (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C360S324200, C360S324110

Reexamination Certificate

active

07929259

ABSTRACT:
A magnetic sensor includes a sensor stack having a first magnetic portion, a second magnetic portion, and a barrier layer between the first magnetic portion and the second magnetic portion. At least one of the first magnetic portion and the second magnetic portion includes a multilayer structure having a first magnetic layer having a positive magnetostriction adjacent to the barrier layer, a second magnetic layer, and an intermediate layer between the first magnetic layer and the second magnetic layer. The magnetic sensor has an MR ratio of at least about 80% when the magnetic sensor has a resistance-area (RA) product of about 1.0 Ω·μm2.

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