International Science Community Association Research Journal of Recent Sciences 14 4 2025 10 2 Studies on Structural and Magnetic Properties of PET/Fe nanocomposite film 5 8 EN Patil Kalpesh H. 1 Department of Chemistry, Ranilaxmibai Mahavidyalay, Parola Dist- Jalgaon, India Borse Gokul P. 2 Department of Chemistry, Ranilaxmibai Mahavidyalay, Parola Dist- Jalgaon, India Sonawane Narendra 3 Department of Chemistry, BSSMP’S, Arts, Commerce and Science College, Songir, India Garud Rahul 4 Department of Chemistry, Ranilaxmibai Mahavidyalay, Parola Dist- Jalgaon, India Yaqoob Tahir 1 Nanoscience and Nanotechnology Laboratory, School of Physics, Devi Ahilya University, Indore, MP, India Mukherjee G.S. 2 Defence Research & Development Organization (DRDO), DMSRDE, Kanpur, 208013, India Choyal Y. 3 Nanoscience and Nanotechnology Laboratory, School of Physics, Devi Ahilya University, Indore, MP, India Banerjee M. 4 Nanoscience and Nanotechnology Laboratory, School of Physics, Devi Ahilya University, Indore, MP, India > Research Paper 2025 8 16 2025 10 2 Polymer–metal nanocomposites offer a versatile platform for integrating structural flexibility with functional magnetic properties. In this paper, the synthesis and characterization of polyethylene terephthalate/iron (PET/Fe) nanocomposite films prepared via ion beam sputtering technique is reported. Structural investigations using GIXRD confirmed the successful incorporation of body-centred cubic (bcc) Fe nanoparticles into the PET matrix, with 4.65 nm average particle size. The absence of oxide-related peaks demonstrated that the embedded Fe retained its metallic state, while modifications in PET diffraction peaks indicated polymer–Fe nanoparticle interactions. Magneto-optical Kerr effect (MOKE) measurements revealed well-defined ferromagnetic hysteresis loops at all azimuthal orientations, with a coercivity of ~19 Oe. An angular dependence of the saturation field suggested slight stress-induced magnetic anisotropy within the film. The findings of the study are discussed in this paper. Copyright@ International Science Community Association