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Bonding Character and Magnetism at the Interface Between Fe and MoS 2 Nanosheets
Author(s) -
Mantovan Roberto,
Matveyev Yuri,
Vinai Giovanni,
Martella Christian,
Torelli Piero,
Molle Alessandro,
Zarubin Sergei,
Lebedinskii Yuri,
Zenkevich Andrei
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201800015
Subject(s) - magnetism , ferromagnetism , spintronics , x ray photoelectron spectroscopy , materials science , heterojunction , paramagnetism , conversion electron mössbauer spectroscopy , crystallography , condensed matter physics , mössbauer spectroscopy , mössbauer effect , chemistry , nuclear magnetic resonance , optoelectronics , physics
In order to enable the use of the prototypical 2D‐layered MoS 2 for spintronics, its integration with ferromagnetic layers is mandatory. By employing interface‐sensitive 57 Fe conversion electron Mössbauer spectroscopy (CEMS), hard X‐ray photoelectron spectroscopy (HAXPES), and transmission electron microscopy (TEM), the chemical, structural, and magnetic properties of the Fe/2D‐MoS 2 interface are investigated. CEMS shows that out of the first 1 nm of Fe in direct contact with 2D‐MoS 2 , about half of the Fe atoms keeps the un‐perturbed Fe local environment, partly in regions where the original 2D‐layered structure of MoS 2 is preserved as shown by TEM. The remaining reacting Fe atoms exclusively bond with Mo, with the majority of them being characterized by a ferromagnetic environment and the rest coordinating in a paramagnetic Fe‐Mo configuration. The preferential Fe bonding with Mo is corroborated by HAXPES analysis. The results provide detailed insight into the link between the bonding configuration and the interfacial magnetism at the Fe/2D‐MoS 2 heterojunction.