Thermal asperity of TMR heads for removable disk drives

Keishi Ohashi; Akinobu Sato; Kunihiko Ishihara; Takao Matsubara; Tsutomu Mitsuzuka; Hisanao Tsuge; Nobuyuki Ishiwata

doi:10.1109/20.951008

Thermal asperity of TMR heads for removable disk drives

Keishi Ohashi^*, Akinobu Sato, Kunihiko Ishihara, Takao Matsubara, Tsutomu Mitsuzuka, Hisanao Tsuge, Nobuyuki Ishiwata

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

The thermal asperity of the tunneling magnetoresistive (TMR) head was studied using Zip-type flexible media, and compared with that of the anisotropic magnetoresistive (AMR) head. The examined head had a shielded structure with the TMR element close to the air bearing surface. Nevertheless, it generated relatively small thermal asperity even when the mechanical spacing between the head and medium was less than 20 nm, at which large and frequent thermal asperity was observed when the AMR head was used. Such relatively small thermal asperity of the TMR head is attributed mainly to the small low-temperature coefficient of the electric resistivity of the TMR element.

Original language	English
Pages (from-to)	1919-1921
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	37
Issue number	4 I
DOIs	https://doi.org/10.1109/20.951008
Publication status	Published - 2001 Jul
Externally published	Yes
Event	8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States Duration: 2001 Jan 7 → 2001 Jan 11

Keywords

Flexible disk
Removable disk drive
Thermal asperity
Tunneling magnetoresistive head

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/20.951008

Cite this

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title = "Thermal asperity of TMR heads for removable disk drives",

abstract = "The thermal asperity of the tunneling magnetoresistive (TMR) head was studied using Zip-type flexible media, and compared with that of the anisotropic magnetoresistive (AMR) head. The examined head had a shielded structure with the TMR element close to the air bearing surface. Nevertheless, it generated relatively small thermal asperity even when the mechanical spacing between the head and medium was less than 20 nm, at which large and frequent thermal asperity was observed when the AMR head was used. Such relatively small thermal asperity of the TMR head is attributed mainly to the small low-temperature coefficient of the electric resistivity of the TMR element.",

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author = "Keishi Ohashi and Akinobu Sato and Kunihiko Ishihara and Takao Matsubara and Tsutomu Mitsuzuka and Hisanao Tsuge and Nobuyuki Ishiwata",

note = "Funding Information: Manuscript received October 13, 2000. This work was supported in part by the New Energy and Industrial Technology Development Organization. K. Ohashi, K. Ishihara, and N. Ishiwata are with NEC Corporation, Nissh-incho, Fuchu, Tokyo, 183-8501 Japan (e-mail: k-ohashi@cb.jp.nec.com; k-ishi-hara@da.jp.nec.com; n-ishiwata@cw.jp.nec.com). N. Sato and H. Tsuge are with NEC Corporation, Miyazakidai, Kawasaki, Kanagawa, 216-8555 Japan (e-mail: sato@mem.cl.nec.co.jp; h-tsuge@cj.jp.nec.com). Publisher Item Identifier S 0018-9464(01)05925-8.; 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) ; Conference date: 07-01-2001 Through 11-01-2001",

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AU - Ohashi, Keishi

AU - Sato, Akinobu

AU - Ishihara, Kunihiko

AU - Matsubara, Takao

AU - Mitsuzuka, Tsutomu

AU - Tsuge, Hisanao

AU - Ishiwata, Nobuyuki

N1 - Funding Information: Manuscript received October 13, 2000. This work was supported in part by the New Energy and Industrial Technology Development Organization. K. Ohashi, K. Ishihara, and N. Ishiwata are with NEC Corporation, Nissh-incho, Fuchu, Tokyo, 183-8501 Japan (e-mail: k-ohashi@cb.jp.nec.com; k-ishi-hara@da.jp.nec.com; n-ishiwata@cw.jp.nec.com). N. Sato and H. Tsuge are with NEC Corporation, Miyazakidai, Kawasaki, Kanagawa, 216-8555 Japan (e-mail: sato@mem.cl.nec.co.jp; h-tsuge@cj.jp.nec.com). Publisher Item Identifier S 0018-9464(01)05925-8.

PY - 2001/7

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N2 - The thermal asperity of the tunneling magnetoresistive (TMR) head was studied using Zip-type flexible media, and compared with that of the anisotropic magnetoresistive (AMR) head. The examined head had a shielded structure with the TMR element close to the air bearing surface. Nevertheless, it generated relatively small thermal asperity even when the mechanical spacing between the head and medium was less than 20 nm, at which large and frequent thermal asperity was observed when the AMR head was used. Such relatively small thermal asperity of the TMR head is attributed mainly to the small low-temperature coefficient of the electric resistivity of the TMR element.

AB - The thermal asperity of the tunneling magnetoresistive (TMR) head was studied using Zip-type flexible media, and compared with that of the anisotropic magnetoresistive (AMR) head. The examined head had a shielded structure with the TMR element close to the air bearing surface. Nevertheless, it generated relatively small thermal asperity even when the mechanical spacing between the head and medium was less than 20 nm, at which large and frequent thermal asperity was observed when the AMR head was used. Such relatively small thermal asperity of the TMR head is attributed mainly to the small low-temperature coefficient of the electric resistivity of the TMR element.

KW - Flexible disk

KW - Removable disk drive

KW - Thermal asperity

KW - Tunneling magnetoresistive head

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JO - IEEE Transactions on Magnetics

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Thermal asperity of TMR heads for removable disk drives

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Keywords

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