Publication
Reference
Paleo Charles, Dupuis Véronique, Wilhelm Fabrice, Rogalev Andrei, Proux Olivier, Boisron Olivier, Kieffer Isabelle, Epicier Thierry, Bugnet Matthieu, Le Roy Damien (2020). Interplay between local structure and magnetic properties of graded exchange-coupled Co@FePt nanocomposite films. Phys. Rev. B, 102, 224409.
Names
  • Charles Paleo
  • Véronique Dupuis
  • Fabrice Wilhelm
  • Andrei Rogalev
  • Olivier Proux
  • Olivier Boisron
  • Isabelle Kieffer
  • Thierry Epicier
  • Matthieu Bugnet
  • Damien Le Roy
Article and keywords
Title
Interplay between local structure and magnetic properties of graded exchange-coupled Co@FePt nanocomposite films
Abstract
Hard magnetic nanocomposites are attractive materials for integration in various microsystems and for building of next-generation permanent magnets. However, exploiting their full potential requires control of their microstructure at the nanometer scale. Studying these materials in model systems synthesized by nanofabrication routes provides interesting insights into the interplay between the microstructure and the magnetic performances. Here, by using a combination of mass-selected low-energy cluster beam deposition and electron-beam evaporation, we prepare nanocomposite films where Co nanoinclusions are integrated in a hard magnetic FePt matrix. Local atomic structures and element-selective magnetic properties of such nanocomposites have been thoroughly investigated using polarization-dependent hard x-ray absorption spectroscopies. These results demonstrate that magnetically soft inclusions are stabilized at room temperature, emphasizing the role of interdiffusion in the preparation of nanocomposites.
Keywords
magnetic nanoparticles, XANES, XMCD, XMLD, EXAFS, TEM, spectroscopy
Content
sample, spectral data
Year
2020
Journal
Physical Review B
Volume
102
Pages
224409
Document type
article
Publication state
published
Doi
10.1103/PhysRevB.102.224409
Identifiers
Experiment/Spectra