PNR study of interfacial magnetism in halfmetal spin valve heterostructures
We propose an experiment to probe the interface magnetic profile in spin-valve structures with a half-metallic ferromagnet in direct contact with a Ag electrode. We will use our recently optimised L21 phases of the full Co-Heusleur alloys Co2MnSi and Co2FeSu as well as the mixed MnxFe(1-x) compound which have atomically flat interfaces with Ag. Our initial DFT models of the system, which are derived from high resolution TEM studies, has found intriguing evidence for an inversion of the spin-polarised density of states occurring at the interface. We propose a PNR study as a function of applied field (up-to 1 T) to probe the spatial extent of this layer and any exchange spring coupling that arises. Our results will provide new insights into how the interface structure (both magnetic and chemical) effect the efficiency and hence exploitability of these Co based materials as possible new spintronic electrodes.
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HASE Thomas; BELL Gavin; S. E. Glover; GOLDSBOROUGH Andrew; KUERBANJIANG Balati and SAERBECK Thomas. (2014). PNR study of interfacial magnetism in halfmetal spin valve heterostructures. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-54-165
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