Abstract
We studied the magnetic properties of frozen magnetic liquids containing amorphous Fe1-xCx particles. By varying the particle size and concentration, we could separate single particle effects from interactions. In samples containing particles with median diameters 5.0 nm and 3.8 nm and with spontaneous saturation magnetizations 7.1 kA m-1 and 9.2 kA m-1, effects of particle interactions are observed. For 3.2 nm no interactions were observed. In samples with negligible interactions the superparamagnetic blocking temperature increases with the particle size. The effective anisotropy constant increases with decreasing particle size, implying that the anisotropy is enhanced by surface effects.
Keywords
Particle sizeSuperparamagnetismNanometreMaterials scienceAnisotropyParticle (ecology)Saturation (graph theory)Condensed matter physicsAmorphous solidGrain sizeMagnetic anisotropyMagnetizationNanotechnologyChemistryCrystallographyMagnetic fieldComposite materialPhysicsOpticsPhysical chemistry
Affiliated Institutions
Related Publications
Surface and Internal Spin Canting in γ-Fe<sub>2</sub>O<sub>3</sub> Nanoparticles
Structural and magnetic properties of γ-Fe2O3 have been studied in isometric nanoparticles ranging from 3 to 14 nm with a narrow particle size distribution. Cation vacancy order...
Static and dynamic magnetic properties of spherical magnetite nanoparticles
We present a detailed study of static and dynamic magnetic behavior of Fe3O4 nanoparticles with average particle sizes 〈d〉 ranging from 5 to 150 nm. Bulk-like properties such as...
Superparamagnetic Silica‐Iron Oxide Nanocomposites for Application in Hyperthermia
Superparamagnetic iron oxide particles embedded in silica are studied for application in hyperthermia. The temperature increase is studied when submitting the samples to a weak ...
Surface-Modified Superparamagnetic Nanoparticles for Drug Delivery: Preparation, Characterization, and Cytotoxicity Studies
Superparamagnetic iron oxide nanoparticles have been used for many years as magnetic resonance imaging (MRI) contrast agents or in drug delivery applications. In this study, a n...
Superparamagnetic Agents in Magnetic Resonance Imaging: Physicochemical Characteristics and Clinical Applications A Review
Superparamagnetic agents in magnetic resonance imaging: physico-chemical characteristics and clinical applications. Superparamagnetic agents have been the subject of extensive r...
Publication Info
- Year
- 1995
- Type
- article
- Volume
- 7
- Issue
- 48
- Pages
- 9269-9277
- Citations
- 53
- Access
- Closed
External Links
Social Impact
Altmetric
PlumX Metrics
Social media, news, blog, policy document mentions
Citation Metrics
53
OpenAlex
0
Influential
42
CrossRef
Cite This
M. Hanson,
Christer Johansson,
M.S. Pedersen
et al.
(1995).
The influence of particle size and interactions on the magnetization and susceptibility of nanometre-size particles.
Journal of Physics Condensed Matter
, 7
(48)
, 9269-9277.
https://doi.org/10.1088/0953-8984/7/48/016
Identifiers
- DOI
- 10.1088/0953-8984/7/48/016