BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Aveshek Maity\, Research Neutron Source Heinz Maier-Leibnitz (F RM II)\, Technical University of Munich\, Garching\, Germany\n\n
Magnetic excitations in the spin-stri pe phases of La-based 214-nickelates have been vigorously explored using i nelastic neutron scattering (INS) study for almost last three decades and still have remained an exciting research field\, especially to understand their differences yet of their structural similarities with high-Tc 214-cu prates. In view of so far reported two-dimensional antiferromagnetic natur e\, out-of-plane magnetic excitations are generally not expected in 214-ni ckelates. In this talk\, I will present our recent results from INS measur ements on the stripe discommensurated phases of Sr-doped Pr3/2S r1/2NiO4 samples\, showing a compelling evidence for the presence of a sizable out-of-plane interaction suggesting a three-dim ensional nature of magnetic excitations near the half-doped region [1\,2]. The measured magnetic excitations are in good agreement with our linear s pin wave (LSW) theory based calculations in the discommensurated spin stri pe models. Additionally\, I will discuss the effect of short-range vs. lon g-range spin stripe correlations on the spin wave dispersion by comparing the results with our INS study on an O-doped sample Pr2NiO 4+&delta\; [3].
\n DTSTART:20230223T210000Z LOCATION:via Zoom\, Room TBA SUMMARY:Stripe discommensuration and spin dynamics in hole-doped 214-nickel ates Pr2-xSrxNiO4+delta END:VEVENT END:VCALENDAR