Effect of mechanical stresses on coercive force and saturation remanence of ensemble of dual-phase interacting nanoparticles

TL;DR

This paper investigates how mechanical stresses and magnetostatic interactions affect the coercive force and saturation remanence in dual-phase interacting nanoparticles, providing theoretical insights into their magnetic behavior.

Contribution

It offers a theoretical analysis of the effects of mechanical stresses and interactions on magnetic properties of dual-phase nanoparticles, specifically $ ext{γ-Fe}_2 ext{O}_3$ coated with cobalt.

Findings

Stretching decreases coercive force and remanence.

Compression increases coercive force and remanence.

Magnetostatic interactions reduce both magnetic parameters.

Abstract

In the dual-phase model of interacting nanoparticles stretching leads to a decrease in both coercive force $H_c$ and saturation remanence $I_{rs}$, and compression - to their growth. Magnetostatic interaction between particles also decreases both $H_c$ and $I_{rs}$. Theoretical analysis was carried out in the framework of the dual-phase system of interacting particles on the example of nanoparticles $\gamma$-$Fe_2O_3$, epitaxially coated with cobalt.