Properties of side-shielded read heads in longitudinal and perpendicular recording

Side-shielded (SS) read heads were fabricated, and their magnetic track widths were calculated and measured. The measurements in longitudinal recording show that SS heads exhibit sharper profiles compared with side-unshielded heads. To examine the effect of side shielding, we studied the dependence...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2005-11, Vol.41 (11), p.4347-4349
Main Authors: Hatatani, M., Suzuki, Y., Katada, H., Yoshida, N., Okada, T., Watanabe, K., Nakamoto, K.
Format: Article
Language:English
Subjects:
CFS
CPP head
Cross-disciplinary physics: materials science
rheology
Density
Disk recording
Exact sciences and technology
Giant magnetoresistance
in-stack bias
Magnetic flux
Magnetic heads
Magnetic sensors
Magnetic shielding
magnetic track width
Magnetism
Materials science
Mathematical analysis
microtrack profile
Other topics in materials science
Perpendicular magnetic recording
perpendicular recording
Physics
Read heads
Recording
Shielding
side shield
Skirts
Soft magnetic materials
Spin valves
Tunneling magnetoresistance
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Summary:Side-shielded (SS) read heads were fabricated, and their magnetic track widths were calculated and measured. The measurements in longitudinal recording show that SS heads exhibit sharper profiles compared with side-unshielded heads. To examine the effect of side shielding, we studied the dependence of the magnetic read width on write density using calculations and experiments. The calculations indicate that the SS head can reduce the skirt of the microtrack profile even at low densities, while the side-unshielded head cannot. This result was qualitatively found in an experiment. We also studied the SS effect in perpendicular recording and found better performance. The calculations predict that SS can strongly reduce the skirt of the microtrack profile even in perpendicular recording. We observed a sharper profile in an SS head compared with a side-unshielded one.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2005.855325