Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 416, Issue -, Pages 98-102Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2016.05.003
Keywords
Magnetic materials; Nanostructures; Chemical synthesis
Funding
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) - the Brazilian Ministry of Education - (MEC) in the program of Science Without Borders [A127/2013]
- CAPES
Ask authors/readers for more resources
Magnetic interaction of the magnetite (Fe3O4) nanoparticles grown on zeolite has been studied. XRD patterns show that in the presence of 25-75 mg of zeolite the average particle size of Fe3O4 decreases to approximate to 6 nm, but with the increase of zeolite content (75 mg < x < 200 mg) the Fe3O4 particles have 10.6 nm in size saturating to 3 nm above 180 mg. Average hyperfine field of Fe at octahedral and tetrahedral sites vary with particle size. With the increase of zeolite 13x from 0 to 100 mg, the saturation magnetization decreases from 63 to 53 emu/g. Mossbauer studies show the presence of different Fe3O4 micro environments, possibly in pores and on the surface of zeolite. Transformation of the superparamagnetic doublet to sextet at 80 K can indicate a variation in the magnetic interaction. At low temperature the interaction between Fe3O4 at the pore and at the surface enhances the magnetic ordering. The nano particles in the pores of zeolite are connected with the surface particles in low zeolite content and get isolated as the amount of zeolite increases. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available