Ferrofluid aggregates phase transitions in the planar magnetic field

TL;DR

This study investigates how cyclic heating and cooling affect the phase transitions and structural stability of ferrofluid aggregates under various magnetic field strengths.

Contribution

It provides new insights into the temperature-dependent phase behavior and structural destruction of ferrofluid aggregates in magnetic fields.

Findings

Equalization of phase concentrations during heating.

Phase destruction temperature varies with magnetic field strength.

Magnetic field influences aggregate stability during thermal cycles.

Abstract

The influence of the cyclic heating and cooling on properties of the aggregates (aka "ferrofluid clusters") in a ferrofluid, which made on the basis of magnetite nanoparticles, are investigated. The heating of the ferrofluid layer with such aggregates leads to equalization of the concentration between high- and low-concentrated phases. The temperature of the equalization of the phase concentrations was determined at different values of an external constant magnetic field, which was applied parallel to the layer of the ferrofluid. The temperature of the destruction of a periodic structure of the magnetic aggregates, which were formed during cooling of a homogeneous phase of the ferrofluid, was obtained at the different values of the applied external magnetic field.