Title :
Static magnetic properties of nanocrystalline Co-Ti doped barium ferrite BaFe12-2xCoxTixO19 (x=0.8)
Author :
Batlle, X. ; Del Muro, M. García ; Tejada, J. ; Pfeiffer, H. ; Görnert, P. ; Sinn, E.
Author_Institution :
Dept. de Fisica Fonamental, Barcelona Univ., Spain
fDate :
3/1/1994 12:00:00 AM
Abstract :
We have studied the static magnetic properties of nanocrystalline Co-Ti doped barium ferrite BaFe10.4Co0.8Ti0.8 O19. The zero-field-cooled (ZFC) and field-cooled (FC) processes show the typical features of a small particle system. The dependence on temperature of the coercive field is discussed within the scope of an aligned and random assembly of particles. The distribution of blocking temperatures is obtained from the remanent-to-saturation magnetization ratio, leading to the mean volume of the magnetic unit (≈(6±3)·104 Å3), in agreement with the mean particle volume determined by TEM (≈1.1·105 Å3). Remanence curves are used to derive the anisotropy field distribution and the interparticle magnetic interaction
Keywords :
barium compounds; coercive force; ferrites; magnetic anisotropy; magnetic properties of fine particles; magnetisation; nanostructured materials; remanence; transmission electron microscope examination of materials; Ba(FeCoTi)12O19; BaFe12-2xCoxTixO19; TEM; aligned random particle assembly; anisotropy field distribution; blocking temperatures; coercive field; field-cooled processes; interparticle magnetic interaction; magnetic unit volume; nanocrystalline Co-Ti doped barium ferrite; particle volume; remanent-to-saturation magnetization ratio; small particle system; static magnetic properties; zero-field-cooled processes; Assembly; Barium; Ferrites; Magnetic anisotropy; Magnetic properties; Magnetization; Perpendicular magnetic anisotropy; Remanence; Temperature dependence; Temperature distribution;
Journal_Title :
Magnetics, IEEE Transactions on
