The Oxidation of Magnetic Particles in Medicinal Ointment

Title
The Oxidation of Magnetic Particles in Medicinal Ointment
Author(s)
김응찬
Keywords
MOSSBAUER; SPINELS
Issue Date
201206
Publisher
KOREAN MAGNETICS SOC
Citation
JOURNAL OF MAGNETICS, v.17, no.2, pp.83 - 85
Abstract
Magnetic particles in a novel, wound healing ointment were studied using Mossbauer spectroscopy and VSM to estimate the stability of the properties of the magnetic particles. The isomer shifts of Fe3O4(A) were found to be 0.49-0.56 mm/s relative to iron metal, this indicates that the iron ions in Fe3O4(A) are Fe3+. On the other hand, the isomer shifts of Fe3O4(B) were found to be 0.91-1.13 mm/s relative to iron metal, this shows that the ion state of Fe3O4(B) is a mixed state of Fe2+ and Fe3+. It is noted that this composition, as well as that of the initial pure component in the form of a highly dispersed fraction (similar to 10 angstrom), differs from the stoichiometric one. It was found that the area ratio of the Mossbauer subspectra of Fe3O4(A) / Fe3O4(B) taken at 87 and 181 K linearly increased in comparison to The initial pure magnetic particles, but the rate of increase of the area ratio at 181 K was about two times that at 87 K. From the magnetic hyperfine field, despite their small size, the particles exhibit no superparamagnetism.
URI
http://hdl.handle.net/YU.REPOSITORY/28098http://dx.doi.org/10.4283/JMAG.2012.17.2.083
ISSN
1226-1750
Appears in Collections:
이과대학 > 물리학과 > Articles
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