Journal ArticleDOI
Mössbauer spectroscopy studies of suspensions of Fe3O4 microcrystals
TLDR
In this article, Mossbauer studies of suspensions of 60 A Fe 3 O 4 microcrystals in acetone with and without oleic acid indicate that chemisorption of OO results in an increase in the surface contribution to the magnetic anisotropy energy constant.About:
This article is published in Journal of Magnetism and Magnetic Materials.The article was published on 1983-11-01. It has received 45 citations till now. The article focuses on the topics: Magnetic anisotropy & Magnetization.read more
Citations
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Physical and chemical properties of superparamagnetic iron oxide MR contrast agents: Ferumoxides, ferumoxtran, ferumoxsil
Chu W. Jung,Paula Jacobs +1 more
TL;DR: The bulk physiochemical properties of the active ingredients in three AMI colloidal, superparamagnetic iron oxide (SPIO), MR contrast agents are described and ferrous content and X-Ray diffraction of the colloids are consistent with nonstoichiometric magnetite phases in all three active ingredients.
Journal ArticleDOI
Magnetite Nanoparticle Dispersions Stabilized with Triblock Copolymers
L. A. Harris,Jonathan D. Goff,A. Y. Carmichael,J. S. Riffle,J. Jonathan Harburn,and T. G. St. Pierre,Martin Saunders +6 more
TL;DR: In this paper, the authors developed complexes of magnetite nanoparticles coated with well-defined hydrophilic polymers so that they could be dispersed in aqueous fluids, and the results showed that these polymers can bind irreversibly to magnetite at the physiological pH.
Journal ArticleDOI
Preparation and Properties of Magnetite and Polymer Magnetite Nanoparticles
TL;DR: In this article, the magnetite core and polymeric shell were synthesized in a single inverse microemulsion and the particle size was varied in the range 80−320 nm by changing of the monomer concentration and water/surfactant ratio.
Journal ArticleDOI
Effect of Nature and Particle Size on Properties of Uniform Magnetite and Maghemite Nanoparticles
TL;DR: Magnetite nanoparticles with two different sizes, 5 and 17 nm, have been prepared by the decomposition of organic precursors in an organic media in the presence of oleic acid as discussed by the authors.
Journal ArticleDOI
Ferrihydrite: surface structure and its effects on phase transformation
TL;DR: In this article, X-ray absorption fine structure (XAFS) spectra were collected on a series of ferrihydrite samples prepared over a range of precipitation and drying conditions.
References
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Journal ArticleDOI
Anisotropie magnétique superficielle et surstructures d'orientation
TL;DR: In this article, the authors propose an energie magnetocristalline and magnetoelastique of a corps ferromagnetique comme la somme de termes elementaires relatifs chacun a liaison, c'est-a-dire a couple of deux atomes proches voisins.
Journal ArticleDOI
Noncollinear Spin Arrangement in Ultrafine Ferrimagnetic Crystallites
TL;DR: In this article, it was shown that the spin configuration differs from the N\'eel type found in large crystallites, and it was proposed that the ions in the surface layer are inclined at various angles to the direction of the net moment.
Journal ArticleDOI
Magnetic Properties of Stable Dispersions of Subdomain Magnetite Particles
Robert Kaiser,G. Miskolczy +1 more
TL;DR: In this article, stable colloidal dispersions of subdomain-size magnetic particles have been prepared that retain their liquid characteristics in the presence of a magnetic field, correcting for the formation of a nonmagnetic surface mantle one unit cell thick.
Journal ArticleDOI
Mössbauer studies of thermal excitations in magnetically ordered microcrystals
Steen Mørup,Henrik Topsøe +1 more
TL;DR: In this article, it was shown that below the superparamagnetic blocking temperature thermally excited oscillations of the magnetization around an energy minimum reduce the average magnetization and the magnetic hyperfine splitting in the Mossbauer spectrum.
Journal ArticleDOI
Magnetic hyperfine splitting in mössbauer spectra of microcrystals
TL;DR: In this paper, a low-temperature approximation for the reduction in the magnetic hyperfine splitting of the Mossbauer spectrum of a microcrystal was derived for arbitrary magnetic energy, and explicit expressions for particles with special types of magnetic anisotropy and for particles exposed to external magnetic fields.
Related Papers (5)
Magnetic Properties of Stable Dispersions of Subdomain Magnetite Particles
Robert Kaiser,G. Miskolczy +1 more