Speaker
Description
In this work, Bi4Ge3O12 doped with Eu3+ was investigated experimentally and theoretically. The synthesis of several samples with different Eu3+ concentrations was carried out by the polymeric precursor method. Photoluminescence spectroscopy was performed, and it shows the typical electronic transitions of Eu3+. FTIR interpretation of samples allows us to infer that Eu3+ substitutes not only Bi3+ but also Ge4+. This interpretation was corroborated by ab initio calculations as both substitutions were found to be thermodynamically stable. Eu3+ naturally takes on the Bi3+ sites, producing ferromagnetic alignment; but when Eu3+ takes on the Ge4+ sites the alignment becomes antiferromagnetic. Since rare earth elements are particularly important in modifying the magnetic and luminescent properties of host materials, our findings open a new way to give a bi-functionality to the Bi4Ge3O12 material through selective doping.
This work was supported by
DGAPA-UNAM IN101523, IG101124, IA100624. Calculations were performed in the DGCTIC-UNAM Supercomputing Center projects: LANCAD-UNAM-DGTIC-422, LANCAD-UNAM-DGTIC-368 and LANCAD-UNAM-DGTIC-150.
Reference
Journal of Alloys and Compounds 966 (2023) 171567
| Keywords | Eu doped, BGO, magnetism |
|---|---|
| Author approval | I confirm |
| Author will attend | I confirm |