impact of na-alginate polymer on fe₃o₄/na-alginate magnetic gel to their néel relaxation time for magnetic hyperthermia applications

Fe3o4/na-alginate magnetic gel has been successfully fabricated using the encapsulated method. the primary objective was to characterize how the contribution of na-alginate hydrogel composition influences the magnetic properties, sar, and néel relaxation time. the crystal and magnetic structures were analyzed using the diffraction patterns of fe3o4, which acts as a filler in the gels. this analysis showed that fe3o4 possesses a cubic crystal structure and a ferromagnetic spin arrangement with a propagation vector k and the irreducible representation γ5. saturation magnetization was assessed using a vsm, showing a decrease in saturation as the na-alginate hydrogel composition increased. we also investigated magnetic hyperthermia under a magnetic field of 129.189 oe at 420 khz, resulting in sar and intrinsic loss power values of about 90.189 w/g and 2.0297 nhm2/kg, respectively. these values are also impacted by néel relaxation of fe3o4 within the magnetic gels.