Looking for (½, ½ ,L) magnetic diffraction peaks in infinite-layer nickelates
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Recently, the discovery of superconductivity in infinite-layer nickelate thin films has generated a great excitement, as their properties are believed to be related to the NiO2 plane, which are considered to be equivalent to the CuO2 planes in cuprate high-Tc superconductors (HTS). Recently it has been shown that infinite layer nickelates exhibit peculiar magnetic excitations with a bandwidth of circa 200 meV in SrTiO3- capped infinite-layer nickelate thin films. The magnetic mode is softening upon Sr-doping. During a previous high-resolution RIXS experiment at ID32 beam-line of ESRF [proposal HC-4628] we could reproduce such a result on our SrTiO3-capped samples. Here we would like to ascertain if such spin excitations are giving rise to a long-range magnetic order and, understand, the possible connection with the superconducting state.



