Frequency response of thin film heads with longitudinal and transverse anisotropy

Author

Mallary, M. ; Torabi, A. ; Batra, S. ; Smith, A.B. ; Cappabianca, Leo ; Goller, W.W.

Author_Institution

Digital Equipment Corp., Shrewsbury, MA, USA

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1334

Lastpage

1336

Abstract

A transmission surface model (TSM) that analyzes the conduction of flux by rotation and wall motion is reported. It has been used to quantitatively compare the predicted performance of thin-film heads with longitudinal and transverse magnetic anisotropy. The TSM analysis predicts that a transversely oriented type of thin-film head can be operated at much higher frequencies than a longitudinally oriented head. In addition, its group delay dispersion is much less. Finally, its susceptibility to wall pinning is an order of magnitude less. Therefore, it is concluded that the traditional aversion of head designers to the longitudinal orientation is justified for frequencies above several megahertz

Keywords

magnetic anisotropy; magnetic heads; magnetic recording; magnetic thin films; flux conduction; group delay dispersion; higher frequencies; longitudinal anisotropy; rotation; susceptibility; thin film heads; transmission surface model; transverse anisotropy; wall motion; wall pinning; Anisotropic magnetoresistance; Circuits; Frequency response; Magnetic analysis; Magnetic anisotropy; Magnetic domain walls; Magnetic films; Magnetic heads; Resistors; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104366

Filename

104366