Nadiya Miftachul Chusna, Frida U. Ermawati, Mashuri Mashuri, Sunaryono Sunaryono
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. © 2025 by SPC (Sami Publishing Company).
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang No. 5, Malang, 65145, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Surabaya, Ketintang Campus, Surabaya, 60231, Indonesia; Department of Physics, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, 60111, Indonesia; PUI-Centre of Advanced Materials for Renewable Energy (CAMRY), Universitas Negeri Malang, Jl. Semarang No. 5, Malang, 65145, Indonesia
