Effect of polydispersity to specific absorption rate

TL;DR

This paper presents an analytic model predicting how size polydispersity affects the specific absorption rate in magnetic nanoparticles, with results validated against experimental data showing resonance behavior and Neel relaxation dominance.

Contribution

It introduces a new analytic magnetization model that accurately predicts the impact of polydispersity on absorption rates in magnetic nanoparticle media.

Findings

Absorption rate exhibits resonance-like behavior with particle size.

Model predictions align closely with experimental results.

Neel relaxation dominates over Brownian relaxation in the studied media.

Abstract

The predictions of a newly developed Bloch-Bloembergen alike analytic magnetization model are compared to experimental results. The effect of size polydipersity on the specific absorption loss is demonstrated for the magnetic nanoparticles containing media. Specific absorption rate shows resonance like behivior as a function of particle size. The obtained results are in excellent agreement with experimental data. The dominace of the Neel relaxation over the Brownian one is demonstrated.