A perpendicular write head design for high-density recording

Batra, S.; Covington, M.; Crawford, T. M.; Crue, B.; Heijden, P.A.A. van der; Jayashankar, Jay. S.; Johns, Earl; Kryder, M.H.; Minor, Kevin; Rottmayer, R.; Tran, U.; West, James C.

doi:10.1109/tmag.2002.988929

Cited by 17 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A challenging problem, for example, is the simulation of magnetic hard disk media including the read/write head and their interaction [139]. High-frequency magnetization reversal during the writing process should also include thermal and eddy current effects.…”

Section: Discussionmentioning

confidence: 99%

Scalable parallel micromagnetic solvers for magnetic nanostructures

Scholz

Fidler

Schrefl

et al. 2003

Computational Materials Science

271

140

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Scalable parallel micromagnetic solvers for magnetic nanostructures

Scholz

Fidler

Schrefl

et al. 2003

Computational Materials Science

271

140

View full text Add to dashboard Cite

“…The first (ST) was a fully functional merged giant magnetoresistive (GMR) reader/single pole-single turn inductive writer designed for an areal density of 100 Gb/in . This head was manufactured using volume production wafer, post wafer fabrication, and assembly processing [15]. The second (MT) TABLE II MEASUREMENT CONDITIONS TABLE III HEAD PARAMETRIC PROPERTIES AND CRITICAL DIMENSIONS used focused-ion-beam trimming to modify a conventional longitudinal ring head to a single-pole design [16].…”

Section: Headsmentioning

confidence: 99%

Perpendicular recording near 100 Gb/in/sup 2/

et al. 2003

Self Cite

View full text Add to dashboard Cite

Theoretical analyses have projected perpendicular recording capable of achieving ultimate areal densities greater than longitudinal recording systems. For perpendicular recording to supplant longitudinal recording, laboratory demonstrations will need to be made which intercept or exceed the areal densities achieved by state-of-the-art longitudinal recording demonstrations. Recent demonstrations have come close to eliminating the gap between these technologies. In this paper, recording experiments at areal densities in the 60 to 100 Gb/in 2 range will be described. It will be shown that the head field from conventional single-pole writers is not well localized to the data track and that if the media do not have sufficiently high nucleation thresholds, this fringe field will gradually erase data on the adjacent track if the track pitch is too aggressive. Extension of this technology to densities of the order of 1 Tb/in 2 will require heads that reduce the extent of the fringe field without sacrificing available on-track field.Index Terms-Magnetic recording high-density recording, magnetic recording systems integration, superparamagnetic limit.

show abstract

“…5. Excellent field gradients at greater than 90 Oe/nm can be achieved with dynamic media coercivities of about 9000 to 10 000 Oe [10]. Assuming the ratio of dynamic coercivities at relatively high data rates to that of vibrating sample magnetometry (VSM) coercivities to be about a factor of 2 [11], optimized recording of perpendicular media with VSM coercivity of about 4500 to 5000 Oe can thus be achieved with this advanced probe head.…”

Section: A Basic Probe Head Design and Modelingmentioning

confidence: 99%

“…Write-pole aspect ratios equal to or less than one were thus achieved to ensure minimal side writing at large skew angles [9]. Sharp and flat trailing edges at the probes (P3) were achieved by thin film deposition and no chemical mechanical lapping (CMP) was required [10]. Excellent thickness control of the recording pole has thus been achieved.…”

Section: A Basic Probe Head Design and Modelingmentioning

confidence: 99%

Advanced probe head for perpendicular recording

et al. 2002

View full text Add to dashboard Cite

Basic design and recording performance of the advanced probe heads are described. Excellent writability of the advanced probe heads is demonstrated by a series of overwrite (OW) and nonlinear transition shift (NLTS) saturation measurements. Write currents as low as 5 mA o p are required for recording. Excellent OW can be obtained with both high and low OW ratios. Media with vibrating sample magnetometry coercivities as high as 7000 Oe can be recorded with OW of 30 dB. Better than 14 dB of NLTS was measured at a linear density of 600 kfci. Minimal side-writing has been observed using the advanced probe heads with square pole shape. External field sensitivity of the advanced probe heads has also been shown to be excellent as larger than 58 Oe of external field is required to erase a low density signal on a 3380-Oe disk. Modeling results also show that the basic architecture of advanced probe head is extendible to 0.1-m square pole.Index Terms-Finite-element model, high areal density magnetic recording, perpendicular recording.

show abstract

A perpendicular write head design for high-density recording

Cited by 17 publications

References 13 publications

Scalable parallel micromagnetic solvers for magnetic nanostructures

Scalable parallel micromagnetic solvers for magnetic nanostructures

Perpendicular recording near 100 Gb/in/sup 2/

Advanced probe head for perpendicular recording

Contact Info

Product

Resources

About