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Magnetic Properties, Electron Paramagnetic Resonance, and Photoelectron Spectroscopy Studies of Nanocrystalline TiO 2 Co‐Doped with Al and Fe
Author(s) -
Yermakov Anatoly Ye.,
Galakhov Vadim R.,
Minin Artem S.,
Mesilov Vitaly V.,
Uimin Mikhail A.,
Kuepper Karsten,
Bartkowski Stefan,
Molochnikov Leonid S.,
Konev Aleksandr S.,
Gaviko Vasiliy S.,
Zakharova Galina S.
Publication year - 2021
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.202000399
Subject(s) - x ray photoelectron spectroscopy , materials science , nanocrystalline material , electron paramagnetic resonance , doping , impurity , analytical chemistry (journal) , transmission electron microscopy , paramagnetism , ion , magnetization , ferromagnetism , nuclear magnetic resonance , condensed matter physics , nanotechnology , chemistry , magnetic field , physics , optoelectronics , organic chemistry , chromatography , quantum mechanics
Electron paramagnetic resonance, X‐ray photoelectron spectroscopy, field dependence of magnetization, X‐ray diffraction, and transmission electron microscopy are applied for the characterization of Al‐doped TiO 2 nanopowders with Fe impurities synthesized by the autoclave‐assisted hydrothermal method and annealed in vacuum or in hydrogen. The sizes of the TiO 2 :(Al, Fe) nanoparticles are estimated to be about 10–20 nm. It is proposed that Al ions are presumably placed in the TiO 2 lattice in interstitial positions. Moreover, Fe 3+ ions can occupy tetrahedral positions of Ti 4+ ions as a result of Al‐doping. The results suggest that Al‐doped TiO 2 nanopowders with Fe impurities annealed in vacuum or hydrogen display both intrinsic and extrinsic ferromagnetic properties.