Maria Artha F. Turnip, Paula S. Rudati, Ahmad Taufiq, Agustinus Agung Nugroho
We report the preparation of the free-standing magnetic film using solution casting method with κ-carrageenan as the matrix and magnetite nanoparticles (Fe3O4 NP) as the magnetic material. The obtained film has a black-brown color and good responsiveness when exposed to permanent magnet. Fe3O4 NP are evenly distributed over the κ-carrageenan matrix and tend to form agglomerations when the number of nanoparticles is increased. The presence of Fe3O4 NP capped by trisodium citrate was demonstrated by the FTIR results of Fe-O, symmetric carboxylate (-COO-), and antisymmetric carboxylate stretching vibrations, respectively at wavenumbers of 418.6 cm-1, 1458.2 cm-1, and 1654.9 cm-1. Functional groups in κ-carrageenan also appeared indicating that Fe3O4 NP attached to κ-carrageenan matrix. The M-H curve of the magnetic film shows the increase in Fe3O4 NP content would increase the magnetization value. The small coercivity field of the magnetic film value shows that the magnetic film is a soft ferromagnetic material. © 2025 Trans Tech Publications Ltd. All Rights Reserved.
Graduate Program of Physics, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, 40132, Indonesia; Department of Electrical Engineering, Politeknik Negeri Bandung, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Indonesia; Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, 40132, Indonesia
