Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 8 2 2012 06 01 Superparamagnetic Behavior of the Magnetic Hysteresis Loop in the Fe2O3@Pt Core-Shell Nanoparticles 93 98 3911 EN Z. Alborzi Department of Physics, Faculty of Science, Urmia, I. R. Iran A. Hassanzadeh Department of Chemistry, Faculty of Science, Urmia, I. R. Iran Nanotechnology Research Center of Urmia University, Urmia, I. R. Iran M. M. Golzan Department of Physics, Faculty of Science, Urmia, I. R. Iran Nanotechnology Research Center of Urmia University, Urmia, I. R. Iran Journal Article 2012 02 20 Studies of the magnetization of Fe2O3@Pt nanoparticles at room temperature showed that there is superparamagnetic contribution with high saturation magnetization about 12.35(emu/g), and soft ferromagnetic contribution with narrow coercive field about 58(Oe). In this paper we fitted the hystersis loop of sample with Brillouin function that demonstrating existence of superparamagnetic phase. Total angular momentum quantum number J With computations performance, gave consistent value at high level that could be the reason into existence of spin clusters. Upshot theoretically, magnetic susceptibility of this sample was calculated from the Brillouin function at fields less than 1000(Oe) from 0.1 to 400 K to determine the high-temperature susceptibility. https://www.ijnnonline.net/article_3911_1bf50aaf147b3b0ddd26a820d2ed394d.pdf