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An Organic Spin Valve Embedding a Self‐Assembled Monolayer of Organic Radicals
Author(s) -
Poggini Lorenzo,
Cucinotta Giuseppe,
Pradipto AbdulMuizz,
Scarrozza Marco,
Barone Paolo,
Caneschi Andrea,
Graziosi Patrizio,
Calbucci Marco,
Cecchini Raimondo,
Dediu Valentin Alek,
Picozzi Silvia,
Mannini Matteo,
Sessoli Roberta
Publication year - 2016
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201500855
Subject(s) - spintronics , materials science , ferromagnetism , spin polarization , condensed matter physics , monolayer , magnetic moment , spin (aerodynamics) , spin pumping , spinplasmonics , paramagnetism , nanotechnology , spin hall effect , physics , quantum mechanics , aerospace engineering , engineering , electron
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 La 0.7 Sr 0.3 MnO 3 (LSMO) manganite surface. This interfacial layer causes clearly detectable modifications of the behavior in prototypical LSMO/NitPO/Gaq 3 /AlO x /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/Gaq 3 interface (spin‐down). It is proposed that the engineering of spin injecting interfaces with molecules having magnetic moment enables additional mechanisms to control and manipulate the spin polarization of currents in spintronic devices.