Sunaryono, Ahmad Taufiq, Mashuri, Suminar Pratapa, M. Zainuri, Triwikantoro, Darminto
Natural sand-based magnetite nanoparticles have been successfully synthesized by coprecipitation method at room temperature. Magnetite nanoparticles were investigated by X-ray diffractometer (XRD), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM). Qualitative analysis of XRD data reveals that the structure of magnetite nanoparticles have the same phase of ICSD No. 82237. Furthermore, quantitative analysis shows that the crystallite size of magnetite nanoparticles ranges between 8.9 nm to 12.5 nm. The average diameter of magnetite nanoparticles strongly depends on the stirring rate of coprecipitation reaction. The best magnetic response was shown by the sample with the largest crystallite size due to its strongest saturation magnetization. © (2015) Trans Tech Publications, Switzerland.
Department of Physics, Institut Teknologi Sepuluh Nopember (ITS), Surabaya, 60111, Indonesia; Department of Physics, State University of Malang (UM), Malang, 65145, Indonesia
