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Magnetic characterization of a single superparamagnetic bead by phase-sensitive micro-Hall magnetometry.
- Source :
-
Applied Physics Letters . 10/22/2007, Vol. 91 Issue 17, p172518. 3p. 3 Graphs. - Publication Year :
- 2007
-
Abstract
- Employing phase sensitive micro-Hall magnetometry at room temperature, we map the susceptibility of a single superparamagnetic bead, 1.2 μm in diameter, as a function of magnetic field. We find that the dependence can be explained by modeling the bead as an ensemble of noninteracting superparamagnetic nanoparticles with log-normal distribution of magnetic moments. We also discuss the effect of possible dipolar interactions between the nanoparticles on the obtained results. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HALL effect
*MAGNETIC susceptibility
*NANOPARTICLES
*PARAMAGNETISM
*MAGNETISM
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 91
- Issue :
- 17
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 27371001
- Full Text :
- https://doi.org/10.1063/1.2802732