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Manipulating coupling state and magnetism of Mn-doped ZnO nanocrystals by changing the coordination environment of Mn via hydrogen annealing
Cheng, Y; Li, WX; Hao, WC; Xu, HZ; Xu, ZF; Zheng, LR; Zhang, J; Dou, SX; Wang, TM; Zheng LR(郑黎荣); Zhang J(张静)
2016
Source PublicationCHINESE PHYSICS B
ISSN1674-1056
EISSN1741-4199
Volume25Issue:1Pages:17301
SubtypeArticle
AbstractMn-doped ZnO nanocrystals are synthesized by a wet chemical route and treated in H-2/Ar atmosphere with different H-2/Ar ratios. It is found that hydrogen annealing could change the coordination environment of Mn in ZnO lattice and manipulate the magnetic properties of Mn-doped ZnO. Mn ions initially enter into interstitial sites and a Mn3+O6 octahedral coordination is produced in the prepared Mn-doped ZnO sample, in which the nearest neighbor Mn3+ and O-2 ions could form a Mn3+-O2--Mn3+ complex. After H-2 annealing, interstitial Mn ions can substitute for Zn to generate the Mn2+O4 tetrahedral coordination in the nanocrystals, in which neighboring Mn2+ ions and H atoms could form a Mn2+-O2--Mn2+ complex and Mn-H-Mn bridge structure. The magnetic measurement of the as-prepared sample shows room temperature paramagnetic behavior due to the Mn3+-O2--Mn3+ complex, while the annealed samples exhibit their ferromagnetism, which originates from the Mn-H-Mn bridge structure and the Mn-Mn exchange interaction in the Mn2+-O2--Mn2+ complex.
Keywordcoordination environment magnetic coupling x-ray absorption fine structure
DOI10.1088/1674-1056/25/1/017301
Indexed BySCI ; ADS
Language英语
WOS IDWOS:000368455100070
ADS Bibcode2016ChPhB..25a7301Y
ADS URLhttps://ui.adsabs.harvard.edu/abs/2016ChPhB..25a7301Y
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2016ChPhB..25a7301Y/citations
Citation statistics
Cited Times:3 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/248108
Collection多学科研究中心
Recommended Citation
GB/T 7714
Cheng, Y,Li, WX,Hao, WC,et al. Manipulating coupling state and magnetism of Mn-doped ZnO nanocrystals by changing the coordination environment of Mn via hydrogen annealing[J]. CHINESE PHYSICS B,2016,25(1):17301.
APA Cheng, Y.,Li, WX.,Hao, WC.,Xu, HZ.,Xu, ZF.,...&张静.(2016).Manipulating coupling state and magnetism of Mn-doped ZnO nanocrystals by changing the coordination environment of Mn via hydrogen annealing.CHINESE PHYSICS B,25(1),17301.
MLA Cheng, Y,et al."Manipulating coupling state and magnetism of Mn-doped ZnO nanocrystals by changing the coordination environment of Mn via hydrogen annealing".CHINESE PHYSICS B 25.1(2016):17301.
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