Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Hysteresis loops of MNP ensembles. (a) Collective hysteresis loop of two MNP systems measured with a vibrating sample magnetometer at T = 300 K. (b) Low-field part of the hysteresis loops showing a difference in coercive field. The measurements were performed on an ensemble of immobilized MNPs. The magnetization values were normalized to the total mass of the sample.
