Review Article
Magnetic Nanoparticles: A Subject for Both Fundamental Research and Applications
Figure 14
Theoretical modeling of the diameter and bias-field dependence of experimentally obtained precession frequencies. (a) Experimentally obtained frequencies of the uniform precession modes from uncoated and 70 nm SiN-coated magnets as a function of magnet diameter (aspect ratio) at 1.68 kOe. Solid line: calculated precession frequencies of single magnets from (1). The gray shaded region shows the possible range of precession frequencies in arrays of magnets separated by 56 nm. (b) Experimental (points) and calculated (curves) precession frequencies as a function of bias magnetic field (). (c) and contributions of different contributions to the effective magnetic field as a function of magnet diameter. Reproduced with permission from Barman et al. [154] © 2006, American Chemical Society.
