| Autor: |
Pughe, Charlotte, Mustonen, Otto H. J., Gibbs, Alexandra S., Etter, Martin, Liu, Cheng, Dutton, Siân E., Friskney, Aidan, Hyatt, Neil C., Stenning, Gavin B. G., Mutch, Heather M., Coomer, Fiona C., Cussen, Edmund J. |
| Zdroj: |
Inorganic Chemistry; March 2022, Vol. 61 Issue: 9 p4033-4045, 13p |
| Abstrakt: |
Isovalent nonmagnetic d10and d0B″ cations have proven to be a powerful tool for tuning the magnetic interactions between magnetic B′ cations in A2B′B″O6double perovskites. Tuning is facilitated by the changes in orbital hybridization that favor different superexchange pathways. This can produce alternative magnetic structures when B″ is d10or d0. Furthermore, the competition generated by introducing mixtures of d10and d0cations can drive the material into the realms of exotic quantum magnetism. Here, Te6+d10was substituted by W6+d0in the hexagonal perovskite Ba2CuTeO6, which possesses a spin ladder geometry of Cu2+cations, creating a Ba2CuTe1–xWxO6solid solution (x= 0–0.3). We find W6+is almost exclusively substituted for Te6+on the corner-sharing site within the spin ladder, in preference to the face-sharing site between ladders. The site-selective doping directly tunes the intraladder, Jrungand Jleg, interactions. Modeling the magnetic susceptibility data shows the d0orbitals modify the relative intraladder interaction strength (Jrung/Jleg) so the system changes from a spin ladder to isolated spin chains as W6+increases. This further demonstrates the utility of d10and d0dopants as a tool for tuning magnetic interactions in a wide range of perovskites and perovskite-derived structures. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
