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Spin-glass-like ordering in the spinel ZnFe2O4 ferrite |
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| Authors: | M.A. HakimM. Manjurul Haque M. HuqP. Nordblad |
| Affiliation: | a Materials Science Division, Atomic Energy Centre, Ramna, Dhaka 1000, Bangladesh b Department of Applied Physics, Electronics and Communication Engineering, Islamic University, Kushtia 7003, Bangladesh c Department of Physics, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh d Solid State Physics, Department of Engineering Sciences, Uppsala University, Uppsala, Sweden |
| Abstract: | In the present study, spin-glass-like ordering has been observed in the spinel ZnFe2O4 ferrite. Field cooled (FC) and zero-field cooled (ZFC) DC magnetizations display divergence at low temperature, which indicates a frozen state with the freezing temperature of Tf=21 K. Frequency dependence of AC susceptibility measurement was performed on the sample. It shows a peak at around Tf, with the peak position shifting as a function of driving frequency, indicating a spin-glass-like transition of the sample. The sample shows a typical spin-glass behavior with a manifestation of non-equilibrium dynamics of the spin glass, such as aging, rejuvenation and memory effects. These experimental findings indicate that Zn-ferrite exhibits a spin-glass-like phase at low temperature and it is not canted antiferromagnetic. |
| Keywords: | Spin-glass AC susceptibility Memory effect Zn-ferrites |
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