The influence of PEG-4000 and silica on crystal structure and magnetic properties of magnesium ferrite (MgFe{sub 2}O{sub 4}) nanoparticles

Journal Article · Tue Apr 19 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4945519· OSTI ID:22591158

Puspitarum, Deska Lismawenning; Hermawan, Agung; Suharyadi, Edi ^[1]

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1. Department of Physics, Gadjah Mada University, Sekip Utara BLS 21 Yogyakarta (Indonesia)

In this paper, reports the influence of polyethylene glycol (PEG-4000) and silica on crystal structure and magnetic properties of MgFe{sub 2}O{sub 4} nanoparticles which is synthesized by the co-precipitation method. The particle size of before coated MgFe{sub 2}O{sub 4} was around 10.5 nm, and became 5.2 nm after PEG-4000 coating and 18.8 nm after silica coating. After coating, there were appeared new phases, α-Fe{sub 2}O{sub 3} (antiferromagnetic), SiO{sub 2} and γ-FeO(OH) which are paramagnetics. The second phase sample decreased responses to the external field. Transmission Electron Microscopy (TEM) morphology analysis on nanoparticles which was coated with PEG 4000 showed that the particles become more spherical, more dispersive, and less aglomerated. The magnetic hysteresis loops which was investigated with Vibrating Sample Magnetometer (VSM) indicated that coercivity of MgFe{sub 2}O{sub 4} was 120.7 Oe, and then decreased to 40.9 Oe after coating and 34.7 Oe for coating with PEG-4000 and silica, respectively. At 15 kOe, the magnetization value decreased from 2.69 emu/g to 0.96 emu/g after coating with PEG-4000 and increased 2.82 emu/g after silica coating. The result revealed the coating with both PEG-4000 and silica influence the magnetic properties of MgFe{sub 2}O{sub 4} nanoparticles.

• OSTI ID: 22591158
• Journal Information: AIP Conference Proceedings, Vol. 1725, Issue 1; Conference: ICAMST 2015: 3. international conference on advanced materials science and technology, Semarang (Indonesia), 6-7 Oct 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
COERCIVE FORCE
COPRECIPITATION
CRYSTAL STRUCTURE
CRYSTALS
FERRATES
IRON HYDROXIDES
IRON OXIDES
MAGNESIUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIZATION
NANOPARTICLES
PARAMAGNETISM
PARTICLE SIZE
POLYETHYLENE GLYCOLS
POLYETHYLENES
SILICA
SILICON OXIDES
TRANSMISSION ELECTRON MICROSCOPY
VIBRATING SAMPLE MAGNETOMETERS