Structural reconstruction and defects transition in mediating room temperature ferromagnetism in Co-doped ZnO film

2013 ◽  
Vol 102 (13) ◽  
pp. 132405 ◽  
Author(s):  
B. Chen ◽  
Q. X. Yu ◽  
Q. Q. Gao ◽  
Y. Liao ◽  
G. Z. Wang
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Film ◽  
Doped Zno ◽  
Co Doped

The Structural, Electrical, Magnetic Properties of (Cu, Co) Co-Doped ZnO Thin Film

2014 ◽  
Vol 556-562 ◽  
pp. 429-432
Author(s):  
Ping Cao ◽  
Yue Bai ◽  
Zhi Qu
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Sol Gel ◽  
Hall Effect Measurement ◽  
Ferromagnetic Semiconductors ◽  
Zno Thin Film ◽  
Zno Film ◽  
Co Doping ◽  
Doped Zno ◽  
Co Doped

Successful synthesis of room-temperature ferromagnetic semiconductors, (Cu, Co) co-doped ZnO film is obtained by sol-gel method. It is found that the essential ingredient in achieving room-temperature ferromagnetism is Cu co-doping. By Hall-effect measurement ap-type conductivity was observed for the Cu co-doped films, which induced the room-temperature ferromagnetism.

The Room Temperature Ferromagnetism of the Electrodeposited ZnCoO Film after the Ammine Plasma Treatment

2013 ◽  
Vol 329 ◽  
pp. 18-21 ◽  
Author(s):  
P. Cao ◽  
Y. Bai
Keyword(s):  
Plasma Treatment ◽  
Room Temperature ◽  
Treatment Process ◽  
Room Temperature Ferromagnetism ◽  
Oxide Materials ◽  
Zno Film ◽  
Xps Spectra ◽  
Wide Range ◽  
Doped Zno ◽  
Co Doped

Zinc oxide materials with outstanding performance are the broadband gap semiconductor, and make it a number of important subjects and a wide range of applications. In this paper, a Co-doped ZnO film grown by electrodeposition shows room-temperature ferromagnetic properties after the ammine plasma treatment. The XPS spectra show that the Co ions have a chemical valence of 2+ and a few nitrogen atoms was incorporated into ZnCoO film during the treatment process to occupy oxygen positions. The electronic properties also give evidence that nitrogen is incorporated into ZnCoO film. So the ferromagnetism is mediated though the p-d exchange interaction between nitrogen induced carriers and Co atoms.

Grain boundary defects-mediated room temperature ferromagnetism in Co-doped ZnO film

2009 ◽  
Vol 482 (1-2) ◽  
pp. 224-228 ◽  
Author(s):  
X.J. Liu ◽  
X.Y. Zhu ◽  
J.T. Luo ◽  
F. Zeng ◽  
F. Pan
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Film ◽  
Doped Zno ◽  
Co Doped

The Room Temperature Ferromagnetism of (N, Co) Co-Doped ZnO Nanopaticles

2014 ◽  
Vol 577 ◽  
pp. 19-22
Author(s):  
Ping Cao ◽  
Yue Bai ◽  
Zhi Qu
Keyword(s):  
Zno Nanoparticles ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Crystal Lattices ◽  
Grown Sample ◽  
N Doping ◽  
Doped Zno ◽  
Zno Crystal ◽  
Zno Nanopaticles ◽  
Co Doped

Co-doped ZnO nanoparticles were fabricated by an electrodeposition method. The XPS results show Co ions have doped into the ZnO crystal lattices successfully. The as-grown sample has no ferromagnetism at room temperature. But after an ammine plasma treatment the room temperature ferromagnetism were detected on Co0.04Zn0.96O nanoparticles. The Hall measurement reveals after the treatment the resistivity increase by three orders of magnitude. Although the aspect conductivity is n type, some holes generated by N doping play an important role to induce the ferromagnetic properties for Co doped ZnO sample.

scholarly journals Doping effect and oxygen defects boost room temperature ferromagnetism of Co-doped ZnO nanoparticles: experimental and theoretical studies

RSC Advances ◽  
2019 ◽  
Vol 9 (40) ◽  
pp. 23012-23020 ◽  
Author(s):  
Yan Zong ◽  
Yong Sun ◽  
Shiyan Meng ◽  
Yajing Wang ◽  
Hongna Xing ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Decomposition Method ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Theoretical Studies ◽  
Thermal Decomposition Method ◽  
Oxygen Defects ◽  
Doped Zno ◽  
Experimental And Theoretical Studies ◽  
Co Doped

Co-doped ZnO nanoparticles with different dosage concentrations were fabricated by a thermal decomposition method.

The Effect of Substrate Temperature on the Room Temperature Ferromagnetism of Co-Doped ZnO Thin Films

2008 ◽  
Vol 37 (5) ◽  
pp. 831-834 ◽  
Author(s):  
Wang Zhuliang ◽  
Li Xiaoli ◽  
Jiang Fengxian ◽  
Tian Baoqiang ◽  
Lü Baohua ◽  
...  
Keyword(s):  
Thin Films ◽  
Substrate Temperature ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Thin Films ◽  
Doped Zno ◽  
Co Doped
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