Characterization of Sm-doped CeO2 nanoparticles and their magnetic properties

被引：70

作者：

Swatsitang, Ekaphan ^{[1
,2
]}

Phokha, Sumalin ^{[3
]}

Hunpratub, Sitchai ^{[3
]}

Maensiri, Santi ^{[4
]}

机构：

[1] Khon Kaen Univ, Fac Sci, Integrated Nanotechnol Res Ctr, Khon Kaen 40002, Thailand

[2] Khon Kaen Univ, Fac Sci, Dept Phys, Khon Kaen 40002, Thailand

[3] Udon Thani Rajabhat Univ, Fac Sci, Dept Phys, Udon Thani, Thailand

[4] Suranaree Univ Technol, Inst Sci, Sch Phys, Nakhon Ratchasima 30000, Thailand

来源：

PHYSICA B-CONDENSED MATTER | 2016年 / 485卷

关键词：

Sm-doped CeO2; Polymer pyrolysis; Magnetic properties; X-ray photoelectron spectroscopy (XPS); Oxygen vacancy; Bound magnetic polaron (BMP); ROOM-TEMPERATURE FERROMAGNETISM; ORIGIN; GROWTH; LAFEO3;

D O I：

10.1016/j.physb.2016.01.002

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Cubic phase Sm-doped CeO2 nanoparticles (Ce1-xSmxO2, x=0, 0.05, 0.10, 0.15 and 0.20) were synthesized by the polymer pyrolysis method. X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and vibrating sample magnetometer (VSM) were employed to characterize the phase, morphology, valence states and magnetic properties of the samples. The samples were calcined at the low temperature of 600 degrees C which resulted in crystallite sizes of 10-20 nm. Raman and XPS spectra showed the presence of CO4+, Ce3+ and Sm3+ ions and oxygen vacancies in the samples. Magnetization curves obtained from all samples exhibited ferromagnetic behavior at room temperature (RT-FM) with a maximum value of 0.012 emu/g for x=0.15. The data exhibited a good fit to bound magnetic polaron (BMP) model curves which account for the RT-FM behaviour by having sufficient concentrations of electrons bound to oxygen vacancies to facilitate a long-range exchange interaction between Ce3+ ions. However, the relatively low values obtained for the BMP concentrations suggest that other mechanisms may also be at play. 0 2016 Elsevier B.V. All rights reserved.

引用

页码：14 / 20

页数：7

共 40 条

[1] Facile synthesis of ferromagnetic Ni doped CeO2 nanoparticles with enhanced anticancer activity [J].

Abbas, Fazal ;

Jan, Tariq ;

Iqbal, Javed ;

Ahmad, Ishaq ;

Naqvi, M. Sajjad H. ;

Malik, Maaza .

APPLIED SURFACE SCIENCE, 2015, 357 :931-936

[2] Structure and magnetic properties of diluted magnetic metal oxides based on Cu-doped CeO2 nanopowders [J].

Al-Agel, Faisal A. ;

Al-Arfaj, Esam ;

Al-Ghamdi, Ahmed A. ;

Stein, Barry D. ;

Losovyj, Yaroslav ;

Bronstein, Lyudmila M. ;

Shokr, F. S. ;

Mahmoud, Waleed E. .

CERAMICS INTERNATIONAL, 2015, 41 (01) :1115-1119

[3] Defect-induced defect-mediated magnetism in ZnO and carbon-based materials [J].

Andriotis, Antonis N. ;

Sheetz, R. Michael ;

Menon, Madhu .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2010, 22 (33)

[4] Room-temperature ferromagnetism in pure ZnO nanoflowers [J].

Bie, Xiaofei ;

Wang, Chunzhong ;

Ehrenberg, H. ;

Wei, Yingjin ;

Chen, Gang ;

Meng, Xing ;

Zou, Guangtian ;

Du, Fei .

SOLID STATE SCIENCES, 2010, 12 (08) :1364-1367

[5] Structural and magnetic study of Fe-doped CeO2 [J].

Brito, Paula C. A. ;

Santos, Daniel A. A. ;

Duque, Jose Gerivaldo S. ;

Macedo, Marcelo A. .

PHYSICA B-CONDENSED MATTER, 2010, 405 (07) :1821-1825

[6] Zener model description of ferromagnetism in zinc-blende magnetic semiconductors [J].

Dietl, T ;

Ohno, H ;

Matsukura, F ;

Cibert, J ;

Ferrand, D .

SCIENCE, 2000, 287 (5455) :1019-1022

[7] Ferromagnetism in rare earth doped cerium oxide bulk samples [J].

Dimri, M. Chandra ;

Khanduri, H. ;

Kooskora, H. ;

Subbi, J. ;

Heinmaa, I. ;

Mere, A. ;

Krustok, J. ;

Stern, R. .

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2012, 209 (02) :353-358

[8] On the origin of ferromagnetism in CeO2 nanocubes [J].

Ge, M. Y. ;

Wang, H. ;

Liu, E. Z. ;

Liu, J. F. ;

Jiang, J. Z. ;

Li, Y. K. ;

Xu, Z. A. ;

Li, H. Y. .

APPLIED PHYSICS LETTERS, 2008, 93 (06)

[9] Synthesis of nanocrystalline samarium-doped CeO2 (SDC) powders as a solid electrolyte by using a simple solvothermal route [J].

Karaca, Tuba ;

Altincekic, Tuba Guerkaynak ;

Oksuzomer, M. Faruk .

CERAMICS INTERNATIONAL, 2010, 36 (03) :1101-1107

[10] Raman scattering and lattice defects in nanocrystalline CeO2 thin films [J].

Kosacki, I ;

Suzuki, T ;

Anderson, HU ;

Colomban, P .

SOLID STATE IONICS, 2002, 149 (1-2) :99-105

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