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

页码：1060 / 1064

页数：5