Related Experiment Video
Updated: Aug 6, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Calculated properties of field-induced aggregates in ferrofluids
1Department of Physics and Astronomy, University of Maine, Orono, Maine 04469-5709, USA.
Abstract:
We have calculated the critical radius of aggregates in thin layers of ferrofluid, assuming a cylindrical aggregate shape, as a function of external field and plate separation. Results are obtained by minimizing the Helmholtz free energy, and can be used to predict aggregate radius and spacing. The model, with entropy included, provides reasonable predictions for the onset of the labyrinth pattern. These results show good agreement when compared with data from experiments on Fe3O4 kerosene-based ferrofluids and magnetorheological fluids.
Related Concept Videos
Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Induced Electric Fields
Induced Electric Fields: Applications
Ferromagnetism
Paramagnetism
Theory of Metallic Conduction
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...

