Appearance of Ferromagnetism in Co-Doped CeO2 Diluted Magnetic Semiconductors Prepared by Solid-State Reaction

被引：61

作者：

Bouaine, A. ^{[2
]}

Green, R. J. ^{[1
]}

Colis, S. ^{[2
]}

Bazylewski, P. ^{[1
]}

Chang, G. S. ^{[1
]}

Moewes, A. ^{[1
]}

Kurmaev, E. Z. ^{[3
]}

Dinia, A. ^{[2
]}

机构：

[1] Univ Saskatchewan, Dept Phys & Engn Phys, Saskatoon, SK S7N 5E2, Canada

[2] UDS ECPM, UDS CNRS, UMR 7504, IPCMS, F-67034 Strasbourg 2, France

[3] Russian Acad Sci, Inst Met Phys, Ural Div, Ekaterinburg 620990, Russia

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 05期

基金：

俄罗斯科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

ROOM-TEMPERATURE FERROMAGNETISM;

D O I：

10.1021/jp1088096

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report on the magnetic and electronic properties of Co-doped CeO2 oxides prepared by a solid-state reaction. The as-prepared samples exhibit pure paramagnetic behavior, but postannealing at 450 degrees C for 1 h under H-2/N-2 atmosphere results in the appearance of ferromagnetism at room temperature. The electronic structure of as-prepared and postannealed Co-doped CeO2 diluted magnetic oxides is investigated using soft X-ray absorption and emission spectroscopy. Co L-edge resonant inelastic X-ray scattering (RIXS) spectra indicate that direct Co-Co bonds form due to the precipitation of Co atoms in CeO2. This is in agreement with zero-field-cooled and field-cooled thermal variations of the magnetization, which indicated the presence of Co clusters with size larger than 8 nm.

引用

页码：1556 / 1560

页数：5

共 35 条

[1] Pure paramagnetic behavior in Mn-doped ZnO semiconductors
Alaria, J.
Bouloudenine, M.
Schmerber, G.
Colis, S.
Dinia, A.
Turek, P.
Bernard, M.
[J]. JOURNAL OF APPLIED PHYSICS, 2006, 99 (08)
[2] Interplay of dopant, defects and electronic structure in driving ferromagnetism in Co-doped oxides: TiO2, CeO2 and ZnO
Ali, Bakhtyar
Shah, Lubna R.
Ni, C.
Xiao, J. Q.
Shah, S. Ismat
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2009, 21 (45)
[3] Paramagnetism of the Co sublattice in ferromagnetic Zn1-xCoxO films
Barla, A.
Schmerber, G.
Beaurepaire, E.
Dinia, A.
Bieber, H.
Colis, S.
Scheurer, F.
Kappler, J-P.
Imperia, P.
Nolting, F.
Wilhelm, F.
Rogalev, A.
Mueller, D.
Grob, J. J.
[J]. PHYSICAL REVIEW B, 2007, 76 (12):
[4] Room-temperature ferromagnetism in Co-doped ZnO thin films prepared by sol-gel method
Belghazi, Y.
Schmerber, G.
Colis, S.
Rehspringer, J. L.
Berrada, A.
Dinia, A.
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 310 (02) : 2092 - 2094
[5] Extrinsic origin of ferromagnetism in ZnO and Zn0.9Co0.1O magnetic semiconductor films prepared by sol-gel technique
Belghazi, Y.
Schmerber, G.
Colis, S.
Rehspringer, J. L.
Dinia, A.
[J]. APPLIED PHYSICS LETTERS, 2006, 89 (12)
[6] Zn1-xCoxO diluted magnetic semiconductors synthesized under hydrothermal conditions
Bouloudenine, M
Viart, N
Colis, S
Dinia, A
[J]. CATALYSIS TODAY, 2006, 113 (3-4) : 240 - 244
[7] Bulk Zn1-xCoxO magnetic semiconductors prepared by hydrothermal technique
Bouloudenine, M
Viart, N
Colis, S
Dinia, A
[J]. CHEMICAL PHYSICS LETTERS, 2004, 397 (1-3) : 73 - 76
[8] Clustering of impurity atoms in Co-doped anatase TiO2 thin films probed with soft x-ray fluorescence
Chang, GS
Kurmaev, EZ
Boukhvalov, DW
D Finkelstein, L
Kim, DH
Noh, TW
Moewes, A
Callcott, TA
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2006, 18 (17) : 4243 - 4251
[9] Synthesis and room-temperature ferromagnetism of CeO2 nanocrystals with nonmagnetic Ca2+ doping
Chen, Xiaobo
Li, Guangshe
Su, Yiguo
Qiu, Xiaoqing
Li, Liping
Zou, Zhigang
[J]. NANOTECHNOLOGY, 2009, 20 (11)
[10] Magnetic properties of Co-doped ZnO diluted magnetic semiconductors prepared by low-temperature mechano synthesis
Colis, S
Bieber, H
Bégin-Colin, S
Schmerber, G
Leuvrey, C
Dinia, A
[J]. CHEMICAL PHYSICS LETTERS, 2006, 422 (4-6) : 529 - 533

← 1 2 3 4 →