| Numéro |
J. Phys. IV France
Volume 08, Numéro PR2, June 1998
Soft Magnetic Materials 13
|
|
|---|---|---|
| Page(s) | Pr2-401 - Pr2-404 | |
| DOI | https://doi.org/10.1051/jp4:1998293 | |
Soft Magnetic Materials 13
J. Phys. IV France 08 (1998) Pr2-401-Pr2-404
DOI: 10.1051/jp4:1998293
CEA, Le Ripault, Département Matériaux, BP. 16, 37260 Monts, France
© EDP Sciences 1998
J. Phys. IV France 08 (1998) Pr2-401-Pr2-404
DOI: 10.1051/jp4:1998293
Influence of Fe2+ on microwave behaviour of M(Co, Ti)l,2 type hexaferrite
C. Brard, T. Taffary, D. Autissier and F. JorionCEA, Le Ripault, Département Matériaux, BP. 16, 37260 Monts, France
Abstract
This work deals with M-type Co,Ti substituted barium hexaferrite,
Ba(CoTi)xFe12-2xO19 studied near the uniaxial-planar transition
( x ≥ 1.2). A single crystal state like was obtained by using textured ceramic. Our aim is to observe
the effect of the divalent iron ions on the permeability curves. We have correlated the presence of
Fe2+ ions with the variation of the value of the permittivity ε at 0.1 GHz.
The concentration of Fe2+ ions has been varied by annealing the sintered materials under
either reducing (N2) or oxidizing (O2) atmosphere. We have tried to interprete
the important variations of the permeability in terms of domain wall and gyromagnetic contributions.
© EDP Sciences 1998