Photo-fluorescent and magnetic properties of iron oxide nanoparticles: Review

Photo-fluorescent and magnetic properties of iron oxide nanoparticles for biomedical applications.
Donglu Shi, M. E. Sadat, Andrew W. Dunna and David B. Mast
Nanoscale 7, 8209 (2015)

(a) Graphical representation of Brownian, Néel and effective relaxation times as a function of particle diameter for different values of anisotropy constant (K)⁴ and (b) representation of heating due to Néel and Brownian relaxations, and hysteresis loss