Determination of an anomalous optical like mode in the magnetic excitation of Pr3/2Sr1/2NiO4
Investigation of spin stripes and their excitations in hole-doped 214-nickelates remains an important research field for the last two decades. Like La-based nickelates, the undoped Pr2NiO4 exhibits a long-range 3D magnetic ordering. Hole doping via Sr or O in Pr2-xSrxNiO4+d leads to the segregation of the holes in the form of stripes in the NiO2 layers. The coulomb frustration, induced by the holes, leads to the phase separation, plays an important role in the stacking of the NiO2 planes along the out-of-plane direction manifesting a competing interaction between in-plane and out-of-plane spin stripes influencing the overall characteristics of the magnetic excitations. From our previous study at thermal TAS PUMA@ FRM II, we have determined the spin-wave dispersion. The measured in-plane excitation shows a symmetrical shift of the dispersion from the AFM zone center in the energy range 35-45 meV, presenting a signature of the presence of an anomalous mode, most probably coming from the out-of-plane interaction which have been mostly neglected in the nickelates. In this proposal, we want to determine unambiguously the presence of this anomalous optical like mode.
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The recommended format for citing this dataset in a research publication is in the following format:
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.147202; DUTTA Rajesh and PIOVANO Andrea. (2020). Determination of an anomalous optical like mode in the magnetic excitation of Pr3/2Sr1/2NiO4. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.EASY-517
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