Abstract
We report an inelastic neutron scattering study on the magnetic excitations of Pr2NiO4+δ (δ∼0.24±0.01) at T=10 K. Spin stripe ordering becomes pronounced below ∼220 K with an incommensurability ϵ≈0.346, and a strong influence of interstitial oxygen is identified on establishing a long-range spin stripe ordering. Apart from the Goldstone modes emerging from the magnetic satellites (qm), multiple homologous modes are observed along the spin stripe modulation separated by Δqm≈0.076 in reciprocal lattice units, which is interpreted by the internal periodicity of the long-range ordered discommensurated spin stripes.
| Original language | English |
|---|---|
| Article number | L100401 |
| Journal | Physical Review B |
| Volume | 103 |
| Issue number | 10 |
| DOIs | |
| State | Published - Mar 2 2021 |
| Externally published | Yes |
Funding
A.M. and R.D. would like to acknowledge the financial support from Technische Universität München and RWTH Aachen Universität, respectively, for performing the measurements at MAPS and IN8. Financial support from the French National Research Agency (ANR) through the project SECTOR No. ANR-14-CE36-0006-01 is gratefully acknowledged.