Browse Prior Art Database

Orienting-Disorienting Magnet For Magnetic Particles

IP.com Disclosure Number: IPCOM000066207D
Original Publication Date: 1979-Feb-01
Included in the Prior Art Database: 2005-Feb-19

Publishing Venue

IBM

Related People

Authors:
Bate, G Dunn, LP Lederle, GM

Abstract

In the manufacture of flexible, magnetic recording media, it is sometimes desirable that the magnetic particles in the coating be oriented (or aligned), as in Fig. 1, and sometimes preferable that they be disoriented (or nonaligned), as in Fig. 2. When the end product is to be magnetic recording tape, for example, it is advantageous to have a highly linearly oriented product. If flexible recording disks are made from oriented material, however, a modulation of the read-back signal amplitude is produced which causes the level of a recorded signal read from the disk to fluctuate as the disk or head rotates. Consequently, it is desirable that the coating on the material used in making flexible recording disks contain highly disoriented magnetic particles.