Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

The effects of intraparticle and interparticle interactions on the magnetic hysteresis loop of frozen suspensions of magnetic nanoparticles



Cindi L. Dennis, Zoe Boekelheide, Jackson Miller, Cordula Gruettner


We present magnetic hysteresis loop measurements at 11 K on suspensions of magnetic nanoparticles dispersed in H2O which have been frozen in a range of applied magnetic fields. These particles exhibit significant interparticle as well as intraparticle magnetic interactions, which affect the shape of the hysteresis loop. To investigate the roles of particle orientation and particle chaining on the shape of the magnetic hysteresis loop, we represent the suspension with a micromagnetic model. We found that the hysteresis loop shape can be explained by effects of the internal parallelepiped-shaped magnetic domain structure, modified by the effects of interparticle interactions from chaining.
Journal of Applied Physics


magnetic nanoparticle, magnetic interactions, chains
Created July 23, 2019, Updated February 26, 2020