Element-specific contributions to improved magnetic heating of theranostic CoFe₂O₄ nanoparticles decorated with Pd.

ABSTRACT: Decoration with Pd clusters increases the magnetic heating ability of cobalt ferrite (CFO) nanoparticles by a factor of two. The origin of this previous finding is unraveled by element-specific X-ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD) combined with atomic multiplet simulations and density functional theory (DFT) calculations. While the comparison of XAS spectra with atomic multiplet simulations show that the inversion degree is not affected by Pd decoration and, thus, can be excluded as a reason for the improved heating performance, XMCD reveals two interrelated responsible sources: significantly larger Fe and Co magnetic moments verify an increased total magnetization which enhances the magnetic heating ability. This is accompanied by a remarkable change

SUBMITTER: Shams SF 

PROVIDER: S-EPMC8338997 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature