Title :
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
fDate :
9/1/1990 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
