Open AccessCrystal Structures and Magnetic Properties of Polyethylene Glycol (PEG-4000) Encapsulated Co0.5Ni0.5Fe2O4 Magnetic Nanoparticles
Author(s) -
Edi Suharyadi,
Lintang Griyanika,
Joko Utomo,
A. K. Agustina,
Takeshi Kato,
S. Iwata
Publication year - 2018
Publication title -
indonesian journal of applied physics
Language(s) - English
Resource type - Journals
eISSN - 2477-6416
pISSN - 2089-0133
DOI - 10.13057/ijap.v8i2.22108
Subject(s) - crystallite , peg ratio , spinel , coprecipitation , nanocrystalline material , materials science , polyethylene glycol , nanoparticle , coercivity , ferrite (magnet) , paramagnetism , magnetization , nuclear magnetic resonance , chemical engineering , analytical chemistry (journal) , chemistry , nanotechnology , chromatography , inorganic chemistry , metallurgy , magnetic field , composite material , condensed matter physics , physics , finance , quantum mechanics , economics , engineering
Nanocrystalline mixed spinel ferrite of Co0.5Ni0.5Fe2O4 magnetic nanoparticles (MNPs) has been successfully synthesized by coprecipitation method and encapsulated by PEG-4000 with various concentrations. X-Ray Diffraction (XRD) patterns showed that nanoparticles contained Co0.5Ni0.5Fe2O4 spinel ferrite with crystallite size of 14.9 nm. After PEG-4000 encapsulation particles size decreased became 7.7 nm. Interaction Co0.5Ni0.5Fe2O4 nanoparticles with long chain PEG-4000 caused the crystal growth trap. Lattice parameter and X-Ray density have no significant difference after encapsulated PEG-4000. The coercivity () of Co0.5Ni0.5Fe2O4 was 214 Oe. The decreased after PEG-4000 encapsulation became 127 Oe, which is due to the decrease of crystallite size. The maximum magnetization (Mmax) of Co0.5Ni0.5Fe2O4 was 12.0 emu/g, and decreased after PEG-4000 encapsulation to 11.7 emu/g, because PEG-4000 is paramagnetic. After the concentration of PEG-4000 increased, then the amount of paramagnetic material increase which lead maximum magnetization decrease.