Using minor loop behavior to investigate the Preisach distribution for particulate media

Author

Salling, C.T. ; Schultz, S.

Author_Institution

Dept. of Phys., California Univ., San Diego, La Jolla, CA, USA

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

2877

Lastpage

2879

Abstract

The shape of minor loops has been measured as a function of remanence for Co-coated γ-Fe₂O₃, barium ferrite, and iron particulate media, as well as a series of particle assemblies in which particle orientation and spacing were varied. The width of the loops at zero field and their axial slope were used as quantitative measures of their shape. In all cases, the minor loops for the same field extrema but different values of average remanence are not congruent. According to an operator analysis of the Preisach model by I.D. Mayergoyz (1986), noncongruence indicates that the Preisach distribution is also a function of field history. This result is in agreement with other experimental investigations of this issue. Hence, noncongruence provides a confirmation of the analysis by Mayergoyz. The amount of noncongruence is used here to determine the degree to which the Preisach distributions for various types of particle assemblies depend on field history

Keywords

barium compounds; cobalt; ferrites; iron; iron compounds; magnetic properties of fine particles; magnetic recording; remanence; BaFe₁₂O₁₉; Co-Fe₂O₃; Fe particles; Preisach distribution; Preisach model; axial slope; function of field history; loops at zero field; minor loop behavior; noncongruence; particle assemblies; particle orientation; particulate media; quantitative measures; remanence; shape of minor loops; Assembly; Coercive force; History; Hysteresis; Iron; Magnetic analysis; Magnetic field measurement; Particle measurements; Remanence; Shape measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92274

Filename

92274