Properties of one-sided probe heads on double-layer perpendicular recording media
- 1 September 1986
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Magnetics
- Vol. 22 (5), 370-372
- https://doi.org/10.1109/tmag.1986.1064613
Abstract
The perpendicular recording mode is still a candidate for obtaining higher densities. Best recording results on a double-layer (DL) medium must be expected from using a probe head (PH). This contribution provides an analysis of the write-read performance of one-sided PHs that do not use an auxiliary pole on the back of the medium. Analytical as well as numerical models were used to calculate the effects of saturation and medium thickness on the write fields. Experimental verification of the modeling results was obtained by measuring the wavelength response of many W-shaped PHs on DL media. Combining this with the calculated response, we obtained a semi-empirical relation between the pole nulls, pole thickness and the pole-to-backlayer distance. It reveals a PH behaviour very different from a ring head (RH). The pole thickness calculated from the measured pole-null wavelengths showed a very close agreement with the optically determined value. The calculated head efficiencies are very small, as was confirmed experimentally, and need improvement before the PH has an output comparable with a RH.Keywords
This publication has 12 references indexed in Scilit:
- Probe-type thin-film head for perpendicular recording using multilayered Fe-Si-Ru filmsJournal of Applied Physics, 1985
- Theory of playback process with soft magnetic underlayerIEEE Transactions on Magnetics, 1985
- The write field of a ring head for a double layer perpendicular mediumIEEE Transactions on Magnetics, 1984
- Cross measurements in magnetic recording: A new way of determining head performanceIEEE Transactions on Magnetics, 1984
- Perpendicular magnetic recording -- Evolution and futureIEEE Transactions on Magnetics, 1984
- A new W-shaped single-pole head and a high density flexible disk perpendicular magnetic recording systemIEEE Transactions on Magnetics, 1984
- A discussion on the crosstalk in longitudinal and perpendicular recordingIEEE Transactions on Magnetics, 1982
- Equations for the field components of a perpendicular magnetic headIEEE Transactions on Magnetics, 1982
- Exact solution for the field of a perpendicular headIEEE Transactions on Magnetics, 1981
- Dependence of reproducing gap null on head geometryIEEE Transactions on Magnetics, 1975