Allicat magnetoresistive head design and performance

Hannon, D. M.; Krounbi, M.; Christner, J.A.

doi:10.1109/20.312276

Cited by 22 publications

(4 citation statements)

References 9 publications

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“…It has been long recognized that one of the main sources for reader instability in thin-film magnetoresistive heads is the coupling between the writer and the reader [13]. The writer-toreader coupling can occur in the preamp, in the FOS [14], or in the transducer itself.…”

Section: Writer-to-reader Couplingmentioning

confidence: 99%

Lumped-element RC model for high-data-rate thin-film heads

et al. 2003

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We have developed a lumped-element model for a thin-film giant magnetoresistive head with an inductive writer and used it to study the effect on the data rate capability. Our work shows that the reader can be approximated well by a resistor ( e ) and a capacitor ( e ) in parallel. The paper discusses the relative importance of different contributors to e and addresses the effect of e on the spectrum of the read-back signal and the electrical reader pulsewidth (PW50) in detail. The model predictions and spin-stand data agree reasonably well. The paper also reports on our study of the amount of writer-to-reader coupling in the transducer. Our work points out the importance of minimizing the parasitic capacitance between elements in the writer and reader and avoiding direct coupling between the writer and reader leads.Index Terms-High data rate, magnetic disk storage, magnetic heads, writer-to-reader coupling.

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Section: Writer-to-reader Couplingmentioning

confidence: 99%

Lumped-element RC model for high-data-rate thin-film heads

et al. 2003

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“…He nce , the e xpe rime nt was de signe d to investigate the role s of both gase s conduction and liquid film in tip ] sample he at transfe r. It may be note d that F igu r e 6. The rmoe lectric voltage of the SThM probe in contact with a mica surface that is he ate d by a re sistive he ater unde r diffe re nt gase ous 2 and humidity environme nts. The solid line s are V fits, whe re V is the voltage applie d to the he ate r. the the rm al conductivity of He is about 7 tim e s that of air.…”

Section: Smentioning

confidence: 99%

Liquid-Film-Mediated Scanning Thermal Microscopy of a Magnetoresistive Reading Head

Majumdar¹

1997

Microscale Thermophysical Engineering

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“…This is due to the complexity of the technology and to the difficulty in controlling the required processes in volume manufacturing. T l ; first announced products by IJ3M used SAL transverse biasing and either anti-ferromagnetic exchange coupling or permanent magnet longitudinal biasing [4,5]. The resulting heads were complex from the materials standpoint and sensitive to machining tolerances [6,7].…”

Section: Introductionmentioning

confidence: 98%

Electrical characteristics of a 500 Mb/in/sup 2/ slanted contact MR head

1994

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Several approaches to achieving high area density in rigid disc magnetic recording with magnetoresistive heads are currently being pursued. The mainstream approach has been dictated by the introduction of two IBM products. These products use soft-adjacent layer (SAL) transverse biasing and either exchange coupling or permanent magnet longitudinal biasing. Rotated current biasing, characteristic of barberpole and slanted contact (SC) biasing, offers the advantages of processing simplicity but suffers from a relatively wide read sensitivity function (RSF). The 45" contact geometry produces a long tail on one side of the RSF which causes excessive adjacent track crosstalk. It is possible to produce readwidths as narrow as 2.5 p m by using the proper current direction and narrow contacts. This approach allows the practical implementation of 5000-6000 tpi devices and 500 Mb/in2 technology. This paper describes the electrical characteristics of one such design and attempts to extrapolate the future performance of SC technology.

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Allicat magnetoresistive head design and performance

Cited by 22 publications

References 9 publications

Lumped-element RC model for high-data-rate thin-film heads

Lumped-element RC model for high-data-rate thin-film heads

Liquid-Film-Mediated Scanning Thermal Microscopy of a Magnetoresistive Reading Head

Electrical characteristics of a 500 Mb/in/sup 2/ slanted contact MR head

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