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Universal behavior of dense clusters of magnetic nanoparticles
- Source :
- AIP Advances. 6:075315
- Publication Year :
- 2016
- Publisher :
- AIP Publishing, 2016.
-
Abstract
- A detailed numerical simulation of quasistatic hysteresis loops of dense clusters of interacting magnetic nanoparticles is carried out. Both clusters of magnetically soft and magnetically hard nanoparticles are considered. The clusters are characterized by an average particle diameter D, the cluster radius Rc, the particle saturation magnetization Ms, and the uniaxial anisotropy constant K. The number of particles in the cluster varies between Np = 30 - 120. The particle centers are randomly distributed within the cluster, their easy anisotropy axes being randomly oriented. It is shown that a dilute assembly of identical random clusters of magnetic nanoparticles can be characterized by two dimensionless parameters: 1) the relative strength of magneto-dipole interaction, K/Ms2, and the average particle concentration within the cluster, η = V Np/Vc. Here V is the nanoparticle volume, and Vc is the volume of the cluster, respectively. In the strong interaction limit, Msη/Ha > > 1, where Ha = 2K/Ms is the a...
- Subjects :
- Materials science
Particle number
Condensed matter physics
General Physics and Astronomy
02 engineering and technology
021001 nanoscience & nanotechnology
Magnetic hysteresis
01 natural sciences
Magnetic anisotropy
0103 physical sciences
Cluster (physics)
Magnetic nanoparticles
Particle
010306 general physics
0210 nano-technology
Anisotropy
Dimensionless quantity
Subjects
Details
- ISSN :
- 21583226
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- AIP Advances
- Accession number :
- edsair.doi...........d8e84b9b658c157b7e0964137f3a4b34
- Full Text :
- https://doi.org/10.1063/1.4959893