TY - JOUR
T1 - Structural, optical and magnetic properties of Cr-substituted CeO2 nanoparticles
AU - Alla, Santhosh Kumar
AU - Prasadarao Komarala, Eswara Vara
AU - Mandal, Rajiv Kumar
AU - Prasad, Nand Kishore
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/10/1
Y1 - 2016/10/1
N2 - Nanocrystalline CrxCe1−xO2 (0 ≤ x ≤ 0.3) samples were synthesized by a microwave refluxing method. These samples were characterized by X-ray diffractometer, Transmission electron microscope, Raman spectroscopy, UV-Vis spectrometer, Photoluminescence, and X-ray photoelectron spectroscopy. The XRD and TEM analyses indicates the formation of single phase in them. UV-vis spectroscopy results displayed blue shift of absorption peaks with increased Cr content. Magnetic measurements showed initial increase followed by decrease of saturation magnetization (MS) with increasing doping concentration. The MS value of x = 0.05 is nearly four times larger than that of undoped CeO2. This initial enhancement of MS has been attributed to the creation of oxygen vacancies. The decrease in MS at higher concentrations, has been corroborated with the appearance of antiferromagnetic interaction above a threshold value of Cr3+ content which is lying between x = 0.05 and 0.1.
AB - Nanocrystalline CrxCe1−xO2 (0 ≤ x ≤ 0.3) samples were synthesized by a microwave refluxing method. These samples were characterized by X-ray diffractometer, Transmission electron microscope, Raman spectroscopy, UV-Vis spectrometer, Photoluminescence, and X-ray photoelectron spectroscopy. The XRD and TEM analyses indicates the formation of single phase in them. UV-vis spectroscopy results displayed blue shift of absorption peaks with increased Cr content. Magnetic measurements showed initial increase followed by decrease of saturation magnetization (MS) with increasing doping concentration. The MS value of x = 0.05 is nearly four times larger than that of undoped CeO2. This initial enhancement of MS has been attributed to the creation of oxygen vacancies. The decrease in MS at higher concentrations, has been corroborated with the appearance of antiferromagnetic interaction above a threshold value of Cr3+ content which is lying between x = 0.05 and 0.1.
KW - Magnetic properties
KW - Nanostructures
KW - Oxides
KW - Photoluminescence spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=84978903918&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2016.07.033
DO - 10.1016/j.matchemphys.2016.07.033
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AN - SCOPUS:84978903918
SN - 0254-0584
VL - 182
SP - 280
EP - 286
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
ER -