Frank Laboratory of Neutron Physics
Department of Neutron Investigations of Condensed Matter
Date and Time: Friday, 6 November 2026, at 15:00
Venue: DNICM Conference hall, bld. 42а, Frank Laboratory of Neutron Physics
Seminar topic: “Beyond periodicity: neutron interference and magnetic order in complex multilayers”
Speaker: Zaky A. Zaky
Abstract:
Wave interference in structured materials provides a common framework linking photonic, phononic, and neutron systems. This contribution examines how structural ordering and magnetic depth profiles shape neutron reflectivity in periodic and Fibonacci Co/Pt multilayers and Nb/Ho heterostructures. Experimental reflectometry and transfer-matrix modeling connect quasiperiodic layer sequences with distinct interference features and multiple characteristic length scales. Polarised neutron reflectometry provides sensitivity to buried magnetisation, supporting the investigation of noncollinear magnetic configurations. Helical ordering and superconducting proximity effects in Nb/Ho systems are discussed as further directions, highlighting the interplay between structural complexity, magnetism, and neutron-wave propagation.