Read performance of tunneling magnetoresistive heads

K. Ishihara; M. Nakada; E. Fukami; K. Nagahara; H. Honjo; K. Ohashi

doi:10.1109/20.950938

Read performance of tunneling magnetoresistive heads

K. Ishihara, M. Nakada, E. Fukami, K. Nagahara, H. Honjo, K. Ohashi

Center for Innovative Integrated Electronic Systems (CIES)

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

12 Citations (Scopus)

Abstract

We discuss the read performance, including the off-track performance and noise characteristics, of TMR heads. A vortex-like sense current field in TMR heads creates insensitive zones in the free layer and affects the output voltage and effective read width. The 1/f noise in the MHz-order frequency range was observed. To achieve a low-noise TMR head for high-density recording with small junction area, a high-quality thin barrier is a key to obtaining low 1/f noise, as well as small R. A products to reduce the shot noise.

Original language	English
Pages (from-to)	1687-1690
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	37
Issue number	4 I
DOIs	https://doi.org/10.1109/20.950938
Publication status	Published - 2001 Jul
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

1/F noise
In situ natural oxidation
Shot noise
TMR head

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10.1109/20.950938

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title = "Read performance of tunneling magnetoresistive heads",

abstract = "We discuss the read performance, including the off-track performance and noise characteristics, of TMR heads. A vortex-like sense current field in TMR heads creates insensitive zones in the free layer and affects the output voltage and effective read width. The 1/f noise in the MHz-order frequency range was observed. To achieve a low-noise TMR head for high-density recording with small junction area, a high-quality thin barrier is a key to obtaining low 1/f noise, as well as small R. A products to reduce the shot noise.",

keywords = "1/F noise, In situ natural oxidation, Shot noise, TMR head",

author = "K. Ishihara and M. Nakada and E. Fukami and K. Nagahara and H. Honjo and K. Ohashi",

note = "Funding Information: Manuscript received February 7, 2001. A part of this work was performed under the management of the Association of Super-Advanced Electronics Technologies (ASET) in the Ministry of International Trade and Industry (MITI) Program supported by the New Energy and Industrial Technology Development Organization (NEDO). The authors are with the NEC Corporation, 1-10, Nisshin-cho, Fuchu, Tokyo, 183-8501, Japan (e-mail: k-ishihara@da.jp.nec.com). Publisher Item Identifier S 0018-9464(01)07302-2.; 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) ; Conference date: 07-01-2001 Through 11-01-2001",

year = "2001",

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T1 - Read performance of tunneling magnetoresistive heads

AU - Ishihara, K.

AU - Nakada, M.

AU - Fukami, E.

AU - Nagahara, K.

AU - Honjo, H.

AU - Ohashi, K.

N1 - Funding Information: Manuscript received February 7, 2001. A part of this work was performed under the management of the Association of Super-Advanced Electronics Technologies (ASET) in the Ministry of International Trade and Industry (MITI) Program supported by the New Energy and Industrial Technology Development Organization (NEDO). The authors are with the NEC Corporation, 1-10, Nisshin-cho, Fuchu, Tokyo, 183-8501, Japan (e-mail: k-ishihara@da.jp.nec.com). Publisher Item Identifier S 0018-9464(01)07302-2.

PY - 2001/7

Y1 - 2001/7

N2 - We discuss the read performance, including the off-track performance and noise characteristics, of TMR heads. A vortex-like sense current field in TMR heads creates insensitive zones in the free layer and affects the output voltage and effective read width. The 1/f noise in the MHz-order frequency range was observed. To achieve a low-noise TMR head for high-density recording with small junction area, a high-quality thin barrier is a key to obtaining low 1/f noise, as well as small R. A products to reduce the shot noise.

AB - We discuss the read performance, including the off-track performance and noise characteristics, of TMR heads. A vortex-like sense current field in TMR heads creates insensitive zones in the free layer and affects the output voltage and effective read width. The 1/f noise in the MHz-order frequency range was observed. To achieve a low-noise TMR head for high-density recording with small junction area, a high-quality thin barrier is a key to obtaining low 1/f noise, as well as small R. A products to reduce the shot noise.

KW - 1/F noise

KW - In situ natural oxidation

KW - Shot noise

KW - TMR head

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EP - 1690

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 4 I

T2 - 8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag)

Y2 - 7 January 2001 through 11 January 2001

ER -

Read performance of tunneling magnetoresistive heads

Abstract

Keywords

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