Dipolar interactions in hard-soft nanocomposites

Author

González, J.M. ; Montero, M.I. ; Raposo, V. ; Crespo, P. ; Marín, P. ; Hernando, A.

Author_Institution

Inst. de Ciencia de Mater., CSIC, Madrid, Spain

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3342

Lastpage

3344

Abstract

We report on the hysteretic behavior of nanocomposite samples formed by Fe and Ba hexaferrite particles. Our most interesting result corresponds to the observation of a loop displacement (in the sense of the negative fields) which depended in a complex way on the composition of the samples. That result was supported by the observation of measurable differences between the high field values of the isothermal and demagnetization remanences. We discuss our experimental data in terms of the characteristics of the dipolar field created into the Fe regions by the hard Ba hexaferrite particles

Keywords

barium compounds; composite materials; demagnetisation; iron; magnetic hysteresis; magnetic particles; nanostructured materials; permanent magnets; remanence; soft magnetic materials; Fe-BaFe₁₂O₁₉; Fe_x/(BaFe₁₂O₁₉)_1-x; demagnetization remanence; dipolar interactions; hard-soft nanocomposites; hexaferrite particles; hysteretic behavior; isothermal remanence; loop displacement; negative fields; Demagnetization; Iron; Isothermal processes; Magnetic field measurement; Magnetic hysteresis; Magnetic materials; Magnetic properties; Nanocomposites; Optical microscopy; Remanence;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908794

Filename

908794