Journal ArticleDOI
Fields and transforms for thin film heads
TLDR
In this paper, a 2D Green's function is integrated to yield exact analytic expressions for the vector magnetic fields and Fourier transforms associated with thin film heads, which accurately represent the fields at all corners, both at the gap and at the pole edges.Abstract:
Analytical expressions for the vector magnetic fields and Fourier transforms associated with thin film heads are presented. These results are derived from accurate, approximate expressions for the surface field of an asymmetric thin film head determined from conformal mapping solutions. A 2D Green's function is integrated to yield exact analytic expressions for the fields, which are of no more complexity than the Karlqvist field approximations. In spite of their simplicity, these expressions accurately represent the fields at all corners, both at the gap and at the pole edges. These results are only approximate at spatial distances beyond the head edges and at wavelengths beyond about ten times the total head length. The Fourier transform of the surface field is also given in simple analytic form. As an example of the use of these expressions, it is shown how the effect of pole length to gap length ratio an pulse superposition can be easily estimated. >read more
Citations
More filters
Journal ArticleDOI
Recording technologies for terabit per square inch systems
Roger Wood,J.J. Miles,T. Olson +2 more
TL;DR: This paper re-examines several aspects of a proposed terabit per square inch recording system and discusses some of the critical technologies required to support such extreme areal densities.
Journal ArticleDOI
Writing of high-density patterned perpendicular media with a conventional longitudinal recording head
TL;DR: In this article, a quasistatic write/read tester was used to study aspects of the recording physics of magnetic islands in CoCrPt media with ∼100 nm lateral dimension using a focused ion beam.
Journal ArticleDOI
Approaches to tilted magnetic recording for extremely high areal density
TL;DR: In this article, the advantages of tilted magnetic recording have been investigated and compared in detail, and it was shown that slightly oriented (in-plane) tilted media show a tremendous improvement in recording performance, which may release the pressure on the fabrication of perfect tilted disk magnetic media.
Journal ArticleDOI
Approximate three-dimensional head fields for perpendicular magnetic recording
TL;DR: In this article, the authors proposed a method for obtaining approximate, but very accurate, 3D head fields for perpendicular magnetic recording heads using an assumed form for the scalar magnetic potential variation between a pole or shield and the underlayer.
Journal ArticleDOI
Tilted media by micromagnetic simulation: A possibility for the extension of longitudinal magnetic recording?
TL;DR: In this paper, the magnetization reversal mechanism is systematically analyzed to determine the angular dependence of coercivity of the tilted media and a sharp transition is observed for the good recording direction.
References
More filters
Journal ArticleDOI
Introduction to magnetic recording
Ohkii Ichigo,Robert M. White +1 more
TL;DR: This introduction to magnetic recording aims to introduce readers to the science of magnetic recording by explaining the basics of magnetism and its applications in literature.
Journal ArticleDOI
Fundamentals of the magnetic recording process
TL;DR: The basic phenomena associated with the recording and reproduction of signals on magnetic recording media are described in this article, where the playback-isolated voltage pulse and square-wave voltage spectrum are discussed in detail for various magnetization orientations.
Journal ArticleDOI
Dependence of reproducing gap null on head geometry
TL;DR: In this paper, the spatial frequency response of reproduce heads with infinite depth, but finite pole length, was determined by superposition of conformal map solutions for simpler geometries, yielding closed form approximations of the frequency response which are accurate to better than 7% for any head length-to-gap length ratio and any spatial frequency.
Journal ArticleDOI
An approach for deriving field equations for magnetic heads of different geometrical configurations
T. Szczech,P. Iverson +1 more
TL;DR: In this paper, an approach for deriving field equations for virtually any magnetic head configuration is described, and results obtained from the new equations and those obtained from previously derived equations are compared to results obtained using the finite difference method.