Influence of stripe height on critical current density of spin-torque noise in tunneling magnetoresistive read heads

Yasushi Endo; Akira Hotta; Masahiro Yamaguchi

doi:10.1109/TMAG.2013.2245312

Influence of stripe height on critical current density of spin-torque noise in tunneling magnetoresistive read heads

Yasushi Endo, Akira Hotta, Masahiro Yamaguchi

工学研究科・電気エネルギーシステム専攻

研究成果: Article › 査読

2 被引用数 (Scopus)

抄録

This paper describes the influence of the stripe height on the critical current density of the spin-torque (ST) noise in the TMR heads using the GHz range noise spectra in detail. The critical current density above which the non-thermal fluctuation noise originates from the ST slightly increases, linearly decreases, becomes minimum, and further keeps constant as the stripe height is reduced. This result means that no trend of j_c appears for the stripe height. The average critical current density is approximately +4.70 ± 1.1 × 10¹¹ A/m², suggesting that the non-thermal fluctuation noise by the ST in the TMR head is independent of the stripe height and occurs at the current density of 10¹¹ A/m ². This result also suggests that this non-thermal fluctuation noise will become a serious problem for the HDD in the near future.

本文言語	English
論文番号	6559238
ページ（範囲）	3745-3747
ページ数	3
ジャーナル	IEEE Transactions on Magnetics
巻	49
号	7
DOI	https://doi.org/10.1109/TMAG.2013.2245312
出版ステータス	Published - 2013

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

文献へのアクセス

10.1109/TMAG.2013.2245312

フィンガープリント「Influence of stripe height on critical current density of spin-torque noise in tunneling magnetoresistive read heads」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル

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title = "Influence of stripe height on critical current density of spin-torque noise in tunneling magnetoresistive read heads",

abstract = "This paper describes the influence of the stripe height on the critical current density of the spin-torque (ST) noise in the TMR heads using the GHz range noise spectra in detail. The critical current density above which the non-thermal fluctuation noise originates from the ST slightly increases, linearly decreases, becomes minimum, and further keeps constant as the stripe height is reduced. This result means that no trend of jc appears for the stripe height. The average critical current density is approximately +4.70 ± 1.1 × 1011 A/m2, suggesting that the non-thermal fluctuation noise by the ST in the TMR head is independent of the stripe height and occurs at the current density of 1011 A/m 2. This result also suggests that this non-thermal fluctuation noise will become a serious problem for the HDD in the near future.",

keywords = "Critical current density, Spin-torque, Thermal mag-noise, Tunneling magnetoresistive (TMR) read head",

author = "Yasushi Endo and Akira Hotta and Masahiro Yamaguchi",

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KW - Critical current density

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KW - Tunneling magnetoresistive (TMR) read head

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