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Recent Developments in Magnetic Recording Heads

Published online by Cambridge University Press:  10 February 2011

Atsushi Tanaka  and
Mitsumasa Oshiki
Atsushi Tanaka
Affiliation:
Storage System Laboratories, Fujitsu Laboratories Ltd., Atsugi, 243–0197, Japan
Mitsumasa Oshiki
Affiliation:
Storage System Laboratories, Fujitsu Laboratories Ltd., Atsugi, 243–0197, Japan
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Abstract

Recently developed and future magnetic head technologies are reviewed. Scaling of dimensions brought about significant increases in recording densities in the last decade. On the recording head aspect, as the read head is narrowed, large improvements in sensitivity are required. Therefore, spin-valve read heads have been improved by introducing synthetic ferromagnetic pinned layers, a spin filter back layer and a specular scattering layer. The current perpendicular to plane (CPP) structure is now being adopted instead of the current in plane (CIP) structure which is the present magnetic head structure. Under heads with a CPP structure, tunneling magnetoresistance (TMR) devices and multilayer GMR are candidates. In CPP mode, we can make better use of “spintronics” or spin-dependent conduction phenomena because device character depends more directly on the spin-dependent electronic states of the materials. Future technologies of read head are also discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 746: Symposia Q/R – Magnetoelectronics-Novel Magnetic Phenomena in Nanostructures – Advanced Characterization of Artificially Structured Magnetic Materials , 2002 , Q8.2
Copyright
Copyright © Materials Research Society 2003

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References

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