Abstract
We report an inelastic neutron scattering study (INS) on the low-energy crystal electric field (CEF) excitations of Pr2-xSrxNiO4+δ single crystals at various temperatures. The observed low-E CEF level of the O-doped sample (x=0,δ≈0.24) at ∼5.5meV appears at significantly lower energy than that of the Sr-doped sample (x=0.5,δ=0.0) at ∼8.5meV. Applying the point charge (PC) model calculation, this has been interpreted as an effect of the interstitial oxygen via lowering the local symmetry and modifying the CEF environment of the central rare earth Pr3+ (H43) ions.
| Original language | English |
|---|---|
| Article number | 195147 |
| Journal | Physical Review B |
| Volume | 105 |
| Issue number | 19 |
| DOIs | |
| State | Published - May 15 2022 |
| Externally published | Yes |
Funding
R. Dutta and A. Maity would like to acknowledge the support of Institut für Kristallographie, RWTH Aachen Universität and Technische Universität München for supporting the travel expenses to perform the experiments at MAPS, ISIS. We thank A. Scheie for the fruitful discussions on the point charge modeling using pycrystalfield . Financial support from the French National Research Agency (ANR) through the project SECTOR No. ANR-14-CE36-0006-01 is gratefully acknowledged.