Co-Ni-Fe write heads with a 10-μm yoke length for high-speed recording

Y. Nonaka; H. Honjo; T. Toba; S. Saito; T. Ishi; M. Saito; N. Ishiwata; K. Ohashi

doi:10.1109/20.908490

Co-Ni-Fe write heads with a 10-μm yoke length for high-speed recording

Y. Nonaka^*, H. Honjo, T. Toba, S. Saito, T. Ishi, M. Saito, N. Ishiwata, K. Ohashi

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

9 Citations (Scopus)

Abstract

We have developed a Co-Ni-Fe write head with a short yoke length for high-speed recording. By reducing the yoke length to 9.5 μm, the eddy currents induced in a yoke with a relatively low resistivity (0.2 μΩm) were reduced. The head of this short yoke had good write performance for a medium with a coercivity of 400 kA/m (5000 Oe) at frequencies up to 250 MHz (the overwrite less than - 30 dB, and nonlinear transition shift less than 7%).

Original language	English
Pages (from-to)	2514-2516
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	36
Issue number	5 I
DOIs	https://doi.org/10.1109/20.908490
Publication status	Published - 2000 Sept
Externally published	Yes
Event	2000 International Magnetics Conference (INTERMAG 2000) - Toronto, Ont, Canada Duration: 2000 Apr 9 → 2000 Apr 12

Keywords

Eddy currents
High-Bs material
High-speed recording
Short yoke length
Write head

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/20.908490

Cite this

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title = "Co-Ni-Fe write heads with a 10-μm yoke length for high-speed recording",

abstract = "We have developed a Co-Ni-Fe write head with a short yoke length for high-speed recording. By reducing the yoke length to 9.5 μm, the eddy currents induced in a yoke with a relatively low resistivity (0.2 μΩm) were reduced. The head of this short yoke had good write performance for a medium with a coercivity of 400 kA/m (5000 Oe) at frequencies up to 250 MHz (the overwrite less than - 30 dB, and nonlinear transition shift less than 7%).",

keywords = "Eddy currents, High-Bs material, High-speed recording, Short yoke length, Write head",

author = "Y. Nonaka and H. Honjo and T. Toba and S. Saito and T. Ishi and M. Saito and N. Ishiwata and K. Ohashi",

year = "2000",

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doi = "10.1109/20.908490",

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pages = "2514--2516",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

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note = "2000 International Magnetics Conference (INTERMAG 2000) ; Conference date: 09-04-2000 Through 12-04-2000",

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TY - JOUR

T1 - Co-Ni-Fe write heads with a 10-μm yoke length for high-speed recording

AU - Nonaka, Y.

AU - Honjo, H.

AU - Toba, T.

AU - Saito, S.

AU - Ishi, T.

AU - Saito, M.

AU - Ishiwata, N.

AU - Ohashi, K.

PY - 2000/9

Y1 - 2000/9

N2 - We have developed a Co-Ni-Fe write head with a short yoke length for high-speed recording. By reducing the yoke length to 9.5 μm, the eddy currents induced in a yoke with a relatively low resistivity (0.2 μΩm) were reduced. The head of this short yoke had good write performance for a medium with a coercivity of 400 kA/m (5000 Oe) at frequencies up to 250 MHz (the overwrite less than - 30 dB, and nonlinear transition shift less than 7%).

AB - We have developed a Co-Ni-Fe write head with a short yoke length for high-speed recording. By reducing the yoke length to 9.5 μm, the eddy currents induced in a yoke with a relatively low resistivity (0.2 μΩm) were reduced. The head of this short yoke had good write performance for a medium with a coercivity of 400 kA/m (5000 Oe) at frequencies up to 250 MHz (the overwrite less than - 30 dB, and nonlinear transition shift less than 7%).

KW - Eddy currents

KW - High-Bs material

KW - High-speed recording

KW - Short yoke length

KW - Write head

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DO - 10.1109/20.908490

M3 - Conference article

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SN - 0018-9464

VL - 36

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JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 5 I

T2 - 2000 International Magnetics Conference (INTERMAG 2000)

Y2 - 9 April 2000 through 12 April 2000

ER -

Co-Ni-Fe write heads with a 10-μm yoke length for high-speed recording

Abstract

Keywords

ASJC Scopus subject areas

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