期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 184, 期 5, 页码 1273-1278出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2011.03.049
关键词
Semiconductors; Sol-gel method; XAFS; Magnetic properties
资金
- National Programs for High Technology Research and Development of China (863) [2009AA03Z303]
- National Natural Science Foundation of China [60878039]
- National Youth Program Foundation of China [10804036, 10904050]
- Program for the development of Science and Technology of Jilin province [20080514]
- Science and Technology of Education Department of Jilin Province [20090426]
The Cr-doped zinc oxide (Zn1-xCrxO, 0 <= x <= 0.08) diluted magnetic semiconductors have been synthesized successfully by the sol-gel method. Investigations on magnetic, optical and structural properties of the produced samples have been done. Energy dispersive spectroscopy (EDS) shows the existence of Cr ion in the Cr-doped ZnO. The results of X-ray diffraction (XRD), the transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) indicate that the Cr ions are at least partially substitutionally incorporated into the crystal lattice of ZnO. The produced samples show good high-T-c (Curie temperature) ferromagnetism (FM) in Cr-doped ZnO nanoparticles with Cr concentration of less than 5 at%. The results of photoluminescence (PL) further testify that FM is an intrinsic property of the Cr-doped ZnO nanoparticles. And the occurrence of FM should mainly contribute to the Cr doping. (C) 2011 Elsevier Inc. All rights reserved.
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