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- Title
Solvothermal reflux synthesis of NiFe2O4 nanocrystals dielectric and magnetic hyperthermia properties.
- Authors
Manohar, A.; Vijayakanth, V.; Hong, Ruoyu
- Abstract
In this study, NiFe2O4 nanocrystals were prepared by solvothermal reflux method. The average crystallite size was found to be 9 nm by X-ray powder diffraction analysis. Selected area electron diffraction profile confirms the crystallinity behavior of the compound. Nanocrystals' surface of the metal oxide and organic functional groups confirm the lattice vibrational studies. Temperature-dependent dielectric constant (ε′) and dielectric loss (ε″) analyses show small values at low temperature and high values at high temperature at different frequencies. Nyquist plot shows non-Debye type of relaxation up to 350 °C, and above 360 °C the plot reveals a Debye type of relaxation. The saturation magnetization of the obtained powder sample is 46.86 emu/g which is lower than that of bulk NiFe2O4. Specific absorption rates (SAR) of sample at two different concentrations were estimated using commercial induction heating system at a field of 235.2 Å and frequency of 316 kHz.
- Subjects
MAGNETIC nanoparticle hyperthermia; NANOCRYSTAL synthesis; MAGNETIC properties; IRON oxide nanoparticles; X-ray powder diffraction; ELECTRON diffraction; DIELECTRICS
- Publication
Journal of Materials Science: Materials in Electronics, 2020, Vol 31, Issue 1, p799
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-019-02588-z