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A novel functionalization of a ferromagnetic electrode employed in spintronic devices is reported. Self‐assembling monolayer technique has been used to chemisorb a paramagnetic phosphonate functionalized nitronyl‐nitroxide radical (NitPO) on the ferromagnetic La0.7Sr0.3MnO3 (LSMO) manganite surface. This interfacial layer causes clearly detectable modifications of the behavior in prototypical LSMO/NitPO/Gaq3/AlOx/Co vertical spintronic devices at temperatures below the ferromagnetic alignment (estimated by density functional theory) of the magnetic moments of NitPO and LSMO. This behavior can be justified by a significant spin filtering effect at the engineered interface, with a carrier selection (spin‐up) opposite to that of the LSMO/Gaq3 interface (spin‐down). It is proposed that the engineering of spin injecting interfaces with molecules having magnetic moment enables additional mechanisms to control …
Publication date: 
1 Jul 2016

Lorenzo Poggini, Giuseppe Cucinotta, Abdul‐Muizz Pradipto, Marco Scarrozza, Paolo Barone, Andrea Caneschi, Patrizio Graziosi, Marco Calbucci, Raimondo Cecchini, Valentin Alek Dediu, Silvia Picozzi, Matteo Mannini, Roberta Sessoli

Biblio References: 
Volume: 3 Issue: 14 Pages: 1500855
Advanced Materials Interfaces