Exploring Anisotropy Contributions in Mn$_\mathrm{x}$Co$_\mathrm{1-x}$Fe$_2$O$_4$ Ferrite Nanoparticles for Biomedical Applications

TL;DR

This study investigates the magnetic anisotropy in Mn-Co ferrite nanoparticles, revealing how shape and interactions influence their properties, which is vital for optimizing biomedical applications like hyperthermia.

Contribution

It provides a detailed analysis of anisotropy contributions in Mn-Co ferrite nanoparticles using neutron measurements, highlighting the roles of shape and interparticle interactions.

Findings

Additional anisotropy from shape and interactions identified

Insights into microstructure and surface effects on magnetic properties

Enhanced understanding for biomedical nanomaterial design

Abstract

Designing well-defined magnetic nanomaterials is crucial for various applications and it demands a comprehensive understanding of their magnetic properties at the microscopic level. In this study, we investigate the contributions to the total anisotropy of Mn-Co mixed spinel nanoparticles. By employing neutron measurements sensitive to the spatially resolved surface anisotropy with sub-\AA\space resolution, we reveal an additional contribution to the anisotropy constant arising from shape anisotropy and interparticle interactions. Our findings shed light on the intricate interplay between chemical composition, microstructure, morphology, and surface effects, providing valuable insights for the design of advanced magnetic nanomaterials for AC biomedical applications, such as cancer treatment by magnetic fluid hyperthermia.