Scalability of Spin Accumulation Sensor

In this work, we investigated a scalability of spin accumulation signal for various device sizes. We found that the spin accumulation signal is enhanced by shrinking Cu wire width and thickness. Moreover we estimate the signal to noise ratio (SNR) of a spin accumulation head structure by using the s...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 49; no. 2; pp. 713 - 717
Main Authors Yamada, Masaki, Sato, Daisuke, Yoshida, Nobuo, Sato, Masashige, Meguro, Kenichi, Ogawa, Susumu
Format Journal Article Conference Proceeding
LanguageEnglish
Published New York, NY IEEE 01.02.2013
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Cross-disciplinary physics: materials science; rheology
Exact sciences and technology
Hard disks
magnetic devices
Magnetic heads
Magnetism
Magnetization
magnetoresistance
Materials science
Other topics in materials science
Physics
Resistance
Signal to noise ratio
Spin valves
Wires
Hard discs
Hard disks
Magnetic heads
Magnetoresistance
Magnetic devices
Magnetic properties
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Summary:In this work, we investigated a scalability of spin accumulation signal for various device sizes. We found that the spin accumulation signal is enhanced by shrinking Cu wire width and thickness. Moreover we estimate the signal to noise ratio (SNR) of a spin accumulation head structure by using the size dependence of spin accumulation signal. The SNR increases with reducing nonmagnetic wire width and thickness, which are corresponding to a track width and a gap width, respectively. And it has the maximum value around 2 ~ 3 Tbit/inch 2 resolution. From these results, it has a possibility that spin accumulation effect is applicable to a new read head for high density hard disk drive.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2012.2226871