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Optical and magnetic properties of Er‐doped Sn O 2 nanoparticles
Author(s) -
Bhaumik S.,
Ray S. K.,
Das A. K.
Publication year - 2013
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.201228786
Subject(s) - x ray photoelectron spectroscopy , crystallite , materials science , doping , photoluminescence , nanoparticle , analytical chemistry (journal) , ferromagnetism , antiferromagnetism , high resolution transmission electron microscopy , transmission electron microscopy , nanotechnology , chemistry , chemical engineering , condensed matter physics , optoelectronics , physics , chromatography , metallurgy , engineering
Er‐doped SnO 2 nanoparticles were synthesized with varying Er concentration by a sol–gel method. X‐ray diffraction (XRD) and high‐resolution transmission electron microscopic studies reveal the crystalline nature of the nanoparticles and the crystallite size decreases with the increase of Er concentration in SnO 2 . For higher Er concentration, the evolution of Er 2 O 3 as a secondary phase is detected. The X‐ray photoelectron spectroscopy (XPS) study depicts the existence of 4d level of Er along with a partially filled 4f state. Infrared photoluminescence (IRPL) measurement shows a strong emission peak at 1540 nm due to Er doping in the SnO 2 nanoparticles, which quenches after 3 at% of Er concentration. Magnetic measurement reveals the antiferromagnetic (AFM) behavior of the Er‐doped samples, though there is an increase in magnetic moment with increase in Er concentration. Undoped SnO 2 shows a weak ferromagnetic interaction, which could be due to the presence of anionic defects (O vacancy).