Dynamic magnetic behavior of cluster-glass ZnFe2O4 nanosystem

WIDATALLAH, H. M; AL-OMARI, I. A; SIVES, F.; STURLA, M. B.; STEWART, S. J.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

Año: 2008 vol. 320 p. 324 - 326

0304-8853

We present an investigation on the dynamic magnetic behavior of nanosized zinc ferrites with different grain sizes (˜6–13 nm) and degree of inversion (˜0.2–0.4). We show that the observed behavior can be interpreted through the progressive blocking and freezing of interacting magnetic clusters formed due to the random non-equilibrium distribution of cations. Furthermore, the glassy character is more pronounced as the ferrite is more inverted, and this coincides with the grain/particle size increment.