Glassy behavior of diluted Cu-Zn ferrites

Publication date: 15 April 2018
Source:Journal of Magnetism and Magnetic Materials, Volume 452
Author(s): Shahida Akhter, M.A. Hakim, S.M. Hoque, R. Mathieu, P. Nordblad
The magnetic behavior of Zn substituted Cu-Zn spinel ferrites having chemical formula Cu1−xZnxFe2O4 (x = 0.7, 0.8, 0.9 and 1.0) has been studied by SQUID magnetometry, by means of magnetic hysteresis, field-cooled (FC) and zero-field-cooled (ZFC) magnetization, memory effect and low field ac susceptibility measurements. These measurements suggest that the ferrimagnetic phase of the x ≤ 0.8 samples is gradually turned into a spin glass (x ≥ 0.9). The compound with x = 0.9 exhibits the typical dynamical behavior of spin glasses, with indication of aging, rejuvenation and memory effects. The evolution of the magnetic properties of Cu-Zn spinel ferrites with substitution of Zn for Cu is discussed.



http://ift.tt/2CjwFf3