Pressure effects in hollow and solid iron oxide nanoparticles

TL;DR

This study investigates how pressure influences the magnetic anisotropy energy in hollow and solid maghemite nanoparticles, revealing that shell structures exhibit a greater pressure response than cores, with implications for magnetic material design.

Contribution

It provides new insights into the pressure-dependent magnetic properties of hollow versus solid maghemite nanoparticles, highlighting the role of shape and shell effects.

Findings

Shell nanoparticles have a larger pressure response than cores.

Differences in magnetic anisotropy are linked to particle shape and size.

Pressure effects vary between hollow and solid nanoparticles.

Abstract

We report a study on the pressure response of the anisotropy energy of hollow and solid maghemite nanoparticles. The differences between the maghemite samples are understood in terms of size, magnetic anisotropy and shape of the particles. In particular, the differences between hollow and solid samples are due to the different shape of the nanoparticles and by comparing both pressure responses it is possible to conclude that the shell has a larger pressure response when compared to the core.