Influence of extreme dilutions on the magnetic properties of single-domain particle aggregates

Author

Bottoni, Giancarlo ; Candolfo, Donato ; Cecchetti, Antonio ; Masoli, Francesco

Author_Institution

Istituto di Fisica delĺUniversità di Ferrara and the Gruppo Nazionale di Struttura della Materia (C.N.R.), Ferrara, Italy

Volume

8

Issue

4

fYear

1972

fDate

12/1/1972 12:00:00 AM

Firstpage

770

Lastpage

772

Abstract

Various magnetic properties of samples of single-domain particles dispersed in a nonmagnetic matrix are examined as functions of the packing fraction $p$ . The range of variability of $p$ is from 0.0003 to 0.20. The squareness ratio and the rotational and alternating hysteresis integrals change with $p$ , while the coercive field, the initial anhysteretic susceptibility, and the areas between the remanence curves are not dependent on $p$ . These results are interpretated as a consequence of the formation of agglomerates interacting with each other, rather than as a consequence of analogous interactions among the single-domain particles which are in the aggregate.

Keywords

Chromium oxides; Iron oxides; Orthoferrites; Permanent magnet materials; Powdered magnetic materials; Aggregates; Chemicals; Energy loss; Jacobian matrices; Magnetic hysteresis; Magnetic properties; Plastics; Powders; Remanence; Saturation magnetization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1972.1067550

Filename

1067550