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Your search keyword '"Shiiki, K."' showing total 171 results
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171 results on '"Shiiki, K."'

7. Response of oscillation-controlled magnetic sensing

Author

Saisho, K. and Shiiki, K.

Subjects
Diuretics -- Analysis, Physics
Abstract

The dependence of the response on the gain of the feedback loop and the oscillation frequency is investigated in the oscillation-controlled magnetic sensing system. Two types of response are observed according to the gain of the feedback loop.

Published
2006

8. Magnetocapacitance effect of spin tunneling junctions

Author

Kaiju, H., Fujita, S., Morozumi, T., and Shiiki, K.

Subjects
Ion bombardment -- Research, Tunneling (Physics) -- Research, Magnetoresistance -- Research, Physics
Abstract

The magnetocapacitance effect of coercive differential spin tunneling junctions Co/Al2O3/Co fabricated on glass substrates by ion-beam mask sputtering is investigated. It is found that the effective capacitance changes with application of an external field.

Published
2002

9. Study of Overwritten Magnetization at the Off-Track Position

Author

Nomura, A., Iijima, K., Haseba, Y., and Shiiki, K.

Subjects
Magnetic recorders and recording -- Analysis, Magnetization -- Analysis, Business, Electronics, Electronics and electrical industries
Abstract

Overwritten magnetization at the off-track position is studied by using micro-magnetic simulation employing the Landau-Lifshitz-Gilbert equation. The nominal track width was 600 nm and bit length was 100 nm. The first bit of overwritten magnetization at large off-track distances more than 50 nm is connected with the third bit at high frequencies. This is due to the decrease of the head field at the edge. The magnetization of the track edge is not quite reversed after completing overwrite. As the frequency increases, the head field decreases due to rise-time effects, so that overwrite cannot be completed normally. An increase in the resistivity of the head core material is useful in order to improve the off-track overwrite characteristics. Index Terms--Computational micromagnetics, high frequency recording, off-track, overwrite, resistivity of the head.

Published
2001

10. Recording Process in High Frequency Field

Author

Haseba, Y., Nagamine, S., and Shiiki, K.

Subjects
Frequencies of oscillating systems -- Research, Magnetism -- Measurement, Business, Electronics, Electronics and electrical industries
Abstract

We study the dynamic recording process due to the write head driven by high frequency signal currents. Magnetizations of medium recorded with fields at several frequencies from 100MHz to 500MHz are calculated by using Landau-Lifshitz-Gilbert equation. As the frequency increases, the normalized rise time of the head field increases proportionally. The bit shift becomes large at high frequencies due to the delay. The peak value of the head field decreases with the delay, so that the magnetization reversal cannot occur at high frequencies. The saturation magnetic flux density of the head tip is almost independent on the rise time. So, the peak value of the head field does not increase at frequencies more than 400MHz as the saturation flux density increases.

Published
1999

12. Perpendicular recording characteristics of ring head and Co-Cr/Co-Zr-Mo double-layer media.

Author

Shiroishi, Y., Tsumita, N., Shiiki, K., Uesaka, Y., and Kudo, M.

Subjects
MAGNETIC recording heads, ELECTROMAGNETS
Abstract

Presents a study which described fundamental read-and-write characteristics of a manganese-zinc ferrite ring head and a cobalt-chromium/cobalt-zirconium-molybdenum double-layer medium in comparison with a cobalt-chromium single medium. Experimental methods; Typical relationship between resolution and pattern peakshift; Conclusion.

Published
1985
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