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IJPAP Vol.50 [2012] >
IJPAP Vol.50(10) [October 2012] >
| Title: | Nanosize dependent electrical and magnetic properties of NiFe2O4 ferrite |
| Authors: | Singh, Sukhdeep
Ralhan, N K
Kotnala, R K
Verma, Kuldeep Chand |
| Keywords: | Nanostructures
Chemical synthesis
Electron microscopy (TEM)
Electrical properties
Magnetic properties |
| Issue Date: | Oct-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The effect of
nanosize particles on dielectric and magnetic properties of NiFe2O4
(NF) ferrite has been studied. NF nanoferrites were prepared by a chemical
combustion route followed by annealing temperatures from 400° to 700°C. The
X-ray diffraction (XRD) shows minor amorphous behaviour of NF at 400°C. However, spinel ferrite structure has been observed with higher
annealing in the temperature range 500-700°C. The average particles size is measured using Debye-Scherer’s
relation. The particle's size is also measured by transmission electron
microscopy and the average value is at nm scale. Room temperature dielectric
properties viz.; dielectric constant (ε) and loss (tanδ) for all the specimens
have been studied as a function of applied frequency in the range 100 Hz-20
MHz. These studies indicate that the values of ε and tanδ depend on the size of particles. The cole-cole plot of
impedance spectroscopy has been used to find the grain size and boundary effect
on electrical properties of NF nanograins. The magnetic measurements show the
value of saturation magnetization (Ms)
is 0.003, 44.95, 38.83, 45.26 emu/g, respectively, observed at 400°, 500°, 600° and 700°C.
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| Page(s): | 739-743 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.50(10) [October 2012]
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