Magnetic orientation of acicular iron particle in recording media

Author

Peng, W.G. ; Wong, S.S. ; Lin, Y.S. ; Wu, C.D.

Author_Institution

Mater. Res. Lab., ITRI, Hsinchu, Taiwan

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2377

Lastpage

2379

Abstract

The orientation behavior of acicular iron particles in an applied field has been surveyed. A large orienting field is needed to align α-Fe particles. Dispersion degree and drying speed affect the particle alignment significantly when permanent magnets are used as orienting apparatus. To obtain high orientation of α-Fe metal tape, an orientation process was introduced. This process used both a repulsive magnet pair and an electromagnet to obtain the orienting field for the coated tape. The permanent magnet pair offers high orienting field above 5 kOe, and the latter offers a low residual orienting field during the drying process of the coating tape

Keywords

ferromagnetic properties of substances; iron; magnetic properties of fine particles; magnetic tapes; α-Fe particles; acicular particles; alpha Fe particles; coated tape; dispersion degree; drying speed; electromagnet; large orienting field; magnetic orientation; particle alignment; recording media; repulsive magnet pair; Coatings; Coercive force; Iron; Magnetic field measurement; Magnetic films; Magnetic recording; Permanent magnets; Powders; Solenoids; Vibration measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179497

Filename

179497