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Room temperature ferromagnetic‐like response in “bulk” Y‐doped CeO 2
Author(s) -
Rakhmatullin R. M.,
Sen S.
Publication year - 2017
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201700010
Subject(s) - crystallite , condensed matter physics , nanocrystalline material , materials science , doping , ferromagnetism , electron paramagnetic resonance , paramagnetism , saturation (graph theory) , ferromagnetic resonance , magnetization , nuclear magnetic resonance , magnetic field , nanotechnology , physics , mathematics , combinatorics , quantum mechanics , metallurgy
Strong ferromagnetic‐like response is observed at room temperature in “bulk”‐ and nano‐crystalline Y‐doped CeO 2 . The saturation magnetization for “bulk” (∼600 nm) crystallites of CeO 2 doped with 25 at.% Y is more than an order of magnitude higher compared to its nanocrystalline (∼10 nm) counterpart. High frequency electron spin resonance and 89 Y nuclear magnetic resonance measurements indicate clustering of electronic defects in the “bulk” crystallites. The remarkable size dependence of the magnetic behavior likely originates from a collective magnetic response of defect‐lined nanodomain interfaces in the “bulk” crystallites, consistent with the giant orbital paramagnetism model.