Ferromagnetism in Chemically-synthesized Co-doped ZnO

被引：24
|
作者：
Kumar, Shalendra [1 ]
Kim, Y. J. [1 ]
Koo, B. H. [1 ]
Choi, Heekyu [1 ]
Lee, C. G. [1 ]
Sharma, S. K. [2 ]
Knobel, M. [2 ]
Gautam, S. [3 ]
Chae, K. H. [3 ]
机构：
[1] Changwon Natl Univ, Sch Nano & Adv Mat Engn, Chang Won 641773, South Korea
[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil
[3] Korea Inst Sci & Technol, Nano Mat Anal Ctr, Seoul 136791, South Korea
来源：
JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2009年 / 55卷 / 03期
关键词：
ZnO; X-ray diffraction and absorption; Oxygen vacancy; SEMICONDUCTORS; NANOPARTICLES;
D O I：
10.3938/jkps.55.1060
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We report; room temperature ferromagnetism (RTFM) in Co-doped ZnO (Zn1-xCoxO; x = 0.01 - 0.05) powder synthesized using a co-precipitation method. Our magnetometry data reveal a weak FM behavior at RT in the range 0.01 < x < 0.05. FM by magnetic FM moment steadily decreases with increasing dopant. The O K-edge near-edge X-ray absorption fin e structure (NEXAFS) spectra indicate that 0 vacancies increases with increasing Co concentration and that the sample with X >= 0.03 has more broadening at 535 and 540 eV, which may be due to the oxygen vacancies. Co in the ZnO host reveals a +2 oxidation state via the K edge NEXAFS spectra.
引用
收藏
页码：1060 / 1064
页数：5
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