Evaluation of front flux guide-type magnetic tunnel junction heads

K. Shimazawa; O. Redon; N. Kasahara; J. J. Sun; K. Sato; T. Kagami; S. Saruki; T. Umehara; Y. Fujita; S. Yarimizu; S. Araki; H. Morita; M. Matsuzaki

doi:10.1109/20.908501

Evaluation of front flux guide-type magnetic tunnel junction heads

K. Shimazawa, O. Redon, N. Kasahara, J. J. Sun, K. Sato, T. Kagami, S. Saruki, T. Umehara, Y. Fujita, S. Yarimizu, S. Araki, H. Morita, M. Matsuzaki

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

18 Citations (Scopus)

Abstract

Magnetic tunnel junction (MTJ) heads have been successfully fabricated using the free layer as flux guide to prevent electrical short during the definition of the air bearing surface (ABS). For a 6 Gbits/in² design, an output as high as 5740 μVpp was achieved for 3 mA sense current, and the output waveform was stable and noise free. Noise analysis confirmed that shot noise is prevailing in these MTJ heads, suggesting that the junction resistance has to be further reduced to challenge spin-valve heads in term of signal to noise ratio. Landau-Lifshitz-Gilbert simulations showed that for 20 Gbits/in² application, the flux guide height should not exceed 0.1 μm.

Original language	English
Pages (from-to)	2542-2544
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	36
Issue number	5 I
DOIs	https://doi.org/10.1109/20.908501
Publication status	Published - 2000 Sep
Externally published	Yes
Event	2000 International Magnetics Conference (INTERMAG 2000) - Toronto, Ont, Canada Duration: 2000 Apr 9 → 2000 Apr 12

Keywords

Front flux guide
Magnetic recording/magnetic tunnel junction heads
Micromagnetic simulation
Shot noise

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/20.908501

Cite this

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title = "Evaluation of front flux guide-type magnetic tunnel junction heads",

abstract = "Magnetic tunnel junction (MTJ) heads have been successfully fabricated using the free layer as flux guide to prevent electrical short during the definition of the air bearing surface (ABS). For a 6 Gbits/in2 design, an output as high as 5740 μVpp was achieved for 3 mA sense current, and the output waveform was stable and noise free. Noise analysis confirmed that shot noise is prevailing in these MTJ heads, suggesting that the junction resistance has to be further reduced to challenge spin-valve heads in term of signal to noise ratio. Landau-Lifshitz-Gilbert simulations showed that for 20 Gbits/in2 application, the flux guide height should not exceed 0.1 μm.",

keywords = "Front flux guide, Magnetic recording/magnetic tunnel junction heads, Micromagnetic simulation, Shot noise",

author = "K. Shimazawa and O. Redon and N. Kasahara and Sun, {J. J.} and K. Sato and T. Kagami and S. Saruki and T. Umehara and Y. Fujita and S. Yarimizu and S. Araki and H. Morita and M. Matsuzaki",

year = "2000",

month = sep,

doi = "10.1109/20.908501",

language = "English",

volume = "36",

pages = "2542--2544",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "5 I",

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

}

TY - JOUR

T1 - Evaluation of front flux guide-type magnetic tunnel junction heads

AU - Shimazawa, K.

AU - Redon, O.

AU - Kasahara, N.

AU - Sun, J. J.

AU - Sato, K.

AU - Kagami, T.

AU - Saruki, S.

AU - Umehara, T.

AU - Fujita, Y.

AU - Yarimizu, S.

AU - Araki, S.

AU - Morita, H.

AU - Matsuzaki, M.

PY - 2000/9

Y1 - 2000/9

N2 - Magnetic tunnel junction (MTJ) heads have been successfully fabricated using the free layer as flux guide to prevent electrical short during the definition of the air bearing surface (ABS). For a 6 Gbits/in2 design, an output as high as 5740 μVpp was achieved for 3 mA sense current, and the output waveform was stable and noise free. Noise analysis confirmed that shot noise is prevailing in these MTJ heads, suggesting that the junction resistance has to be further reduced to challenge spin-valve heads in term of signal to noise ratio. Landau-Lifshitz-Gilbert simulations showed that for 20 Gbits/in2 application, the flux guide height should not exceed 0.1 μm.

AB - Magnetic tunnel junction (MTJ) heads have been successfully fabricated using the free layer as flux guide to prevent electrical short during the definition of the air bearing surface (ABS). For a 6 Gbits/in2 design, an output as high as 5740 μVpp was achieved for 3 mA sense current, and the output waveform was stable and noise free. Noise analysis confirmed that shot noise is prevailing in these MTJ heads, suggesting that the junction resistance has to be further reduced to challenge spin-valve heads in term of signal to noise ratio. Landau-Lifshitz-Gilbert simulations showed that for 20 Gbits/in2 application, the flux guide height should not exceed 0.1 μm.

KW - Front flux guide

KW - Magnetic recording/magnetic tunnel junction heads

KW - Micromagnetic simulation

KW - Shot noise

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U2 - 10.1109/20.908501

DO - 10.1109/20.908501

M3 - Conference article

AN - SCOPUS:0034260494

VL - 36

SP - 2542

EP - 2544

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

IS - 5 I

T2 - 2000 International Magnetics Conference (INTERMAG 2000)

Y2 - 9 April 2000 through 12 April 2000

ER -

Evaluation of front flux guide-type magnetic tunnel junction heads

Abstract

Keywords

ASJC Scopus subject areas

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