Current thin film heads without gap-nulls

Author

Huang, Yuh-Tyng ; Chang, Ching-Ray ; Huang, Huei-Li

Author_Institution

Dept. of Phys., Nat. Taiwan Univ., Taipei, Taiwan

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1677

Lastpage

1679

Abstract

Two types of reproducing heads without gap-nulls for inductive longitudinal magnetic recording have been modeled theoretically. The first type of head is a superposition of several infinitely long and current-carrying thin-film sheets with the sheet width varying linearly and flush with one side. The second type of head has the form of the continuous distribution of thin films, that is, a current head with trapezoidal cross section. The spectral responses of these heads are compared with that of a conventional Karlquist head. It is concluded that these two types of current heads can reproduce signals at much shorter wavelengths than conventional Karlquist heads and yield no gap-nulls

Keywords

magnetic heads; magnetic recording; magnetic thin film devices; continuous distribution; current-carrying thin-film sheets; gap-nulls; inductive longitudinal magnetic recording; reproducing heads; spectral responses; superposition; trapezoidal cross section; Bandwidth; Coils; Couplings; Equations; Fourier transforms; Magnetic heads; Magnetic separation; Magnetization reversal; Physics; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104489

Filename

104489