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| Hauptseite > Publikationsdatenbank > Magnetic chirality in superconducting/ferromagneticheterostruc-tures: insight via polarized GISANS |
| Hauptseite > Publikationsdatenbank > Magnetic chirality in superconducting/ferromagneticheterostruc-tures: insight via polarized GISANS |
| Conference Presentation (Invited) | FZJ-2024-05776 |
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2024
Abstract: The coexistence of different order parameters can lead to exotic new quantum phenomena. In hardcondensed matter materials, their interplay often generates magnetic chiral structures with correlationson the nanometer and mesoscopic length scale, which can be explored by polarization-analyzedSmall-Angle-Neutron-Scattering (SANS) in bulk systems, and by its surface-sensitive counterpartGrazing-Incidence-SANS (GISANS) in thin film structures. Thin film Nb/FePd exhibits coexistingsuperconducting and ferromagnetic phases, affecting both the superconducting and the magneticorder around its superconducting Tc [1,2]. While around Tc in Nb the superconducting state is confinedabove the domain walls of FePd, the superconducting state itself is affecting the width wDWof magnetic domain walls in FePd [1].Although a Dzyaloshinskii–Moriya Interaction (DMI) leading to magnetic chirality is not expectedin the L10-structured FePd, its domain walls obtain a preferred chiral direction, unveiled by polarizedGISANS. An extensive study combining GISANS, circular-dichroism X-ray Resonant MagneticScattering (CD-XRMS), and Density Functional Theory (DFT), yields unique insight into the chiralwall formation and its origin.At the ESS, neutron polarization analysis will be supported on many instruments [3], and togetherwith a wide range of sample environments will enable pioneering science projects. Based on theabove-mentioned science case using polarized GISANS, I will additionally present the impact frominstrumentational and data reduction aspects.[1] A. Stellhorn, PhD thesis, RWTH Aachen University (2021).[2] A. Stellhorn et al., New Journal of Physics 22, 093001 (2020).[3] W. T. Lee et al., Report on ESS Polarisation Workshop, ESS-3549713 (2020).
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