Material properties and domain structure influence on pole erasure occurrence in perpendicular recording heads

Hirata, Ken‐ichi; Roppongi, Tetsuya; Ohtsuki, M.; Yamaguchi, A.; Noguchi, K.

doi:10.1109/tmag.2005.855308

Cited by 12 publications

(7 citation statements)

References 7 publications

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“…The pole erasure can be eliminated through several means to align the magnetization in the track width direction. These solutions are a multilayer film structure [11], high anisotropy material [12], controlling stress-induced anisotropy [13], and the proper aspect ratio of the pole tip [14].…”

Section: Performance Of Cf-spt Headmentioning

confidence: 99%

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Cusp-Field Single-Pole-Type (CF-SPT) Head for Perpendicular Recording

Yamakawa

2009

Nanostructure Science and Technology

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Section: Performance Of Cf-spt Headmentioning

confidence: 99%

“…12 Effect of (a) shield gap length and (b) shield height on head field strength and gradientFig. 8.13 (a) CF-SPT head with shield structure formed by FIB.…”

mentioning

confidence: 99%

Cusp-Field Single-Pole-Type (CF-SPT) Head for Perpendicular Recording

Yamakawa

2009

Nanostructure Science and Technology

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“…As a result, the data can be erased unintentionally. Special efforts in thin-film magnetic material selection, film properties, and processes are necessary to ensure a pole-erasure free write head [9]. Pole lamination is also found to be very effective in minimizing pole remanence.…”

Section: A Pole Erasurementioning

confidence: 99%

Challenges for Perpendicular Write Heads at High Recording Density

et al. 2007

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Perpendicular recording technology has become the main stream for 130 Gb/in 2 HDD products. In this paper, challenges in perpendicular write head are discussed. Design tradeoffs and concerns of narrow-track single-pole heads, trailing shield heads, floating TS heads, and wrapped-around-shield (WAS) heads are discussed. Experimental data show that WAS heads provide good narrow track and high linear density performance. An areal density of 343 Gb/in 2 has been achieved at a very aggressive magnetic spacing condition.

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“…(1) and (2) could be solved by the process technologies of the lithography and the dry etching, etc. (3) could be solved by giving proper magneto elastic energy (polarity and magnitude) in addition to the development of the magnetic pole material with high anisotropy energy [17,18], (4) is under development for practical use with the principle experiment [19].…”

Section: Subjects For Further Higher Recording Densitymentioning

confidence: 99%

Current status and future of magnetic heads for HDD

Terunuma¹

2007

Phys. Status Solidi (c)

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The rapid growth in consumer electronics application requires higher capacity data storage. For hard disk drive (HDD), many new technologies, such as media, heads, head‐disk interface (HDI), pre‐amp. and so on, have been introduced in order to increase the recording density. This paper focus on magnetic head technologies, such as materials, structures, fabrication process and head performance for HDD. For read heads, tunneling magnetoresistive (TMR) heads have come successively to replace giant magnetoresistive (GMR) heads. Barrier materials have been studied to obtain higher magnetoresisance (MR) ratio with lower resistance area product (RA). AlOx have been used as barrier for 100–120 Gb/in2 TMR heads. MgO barrier shows significantly large MR ratio and is also workable to TMR heads as AlOx one. For longitudinal magnetic recording (LMR) writer, recording performance has been improved with reducing yoke length and coil turns and changing to pole materials with higher saturation magnetization (Bs). Perpendicular magnetic recording (PMR) is introduced for over 120 Gb/in2. Combination between head and medium is much more important in PMR than LMR. The magnetic head is still one of the key component of HDD and is expected to be going to further promote the redording density and performance of HDD in the future. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Material properties and domain structure influence on pole erasure occurrence in perpendicular recording heads

Cited by 12 publications

References 7 publications

Cusp-Field Single-Pole-Type (CF-SPT) Head for Perpendicular Recording

Cusp-Field Single-Pole-Type (CF-SPT) Head for Perpendicular Recording

Challenges for Perpendicular Write Heads at High Recording Density

Current status and future of magnetic heads for HDD

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