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　(epsilon　＇)　and　dielectric　loss　(epsilon　＇＇)　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　degrees　C,　and　above　360　degrees　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　angstrom　and　frequency　of　316　kHz.