Synthesis of Room-Temperature Ferromagnetic Co-Doped ZnO Nanocrystals under a High Magnetic Field

2007 ◽  
Vol 111 (16) ◽  
pp. 5893-5897 ◽  
Author(s):  
Dewei Chu ◽  
Yu-Ping Zeng ◽  
Dongliang Jiang
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Room Temperature ◽  
Zno Nanocrystals ◽  
Doped Zno ◽  
Co Doped

Structure and properties of Co-doped ZnO films prepared by thermal oxidization under a high magnetic field

nano Online ◽  
2016 ◽  
Author(s):  
Guojian Li ◽  
Huimin Wang ◽  
Qiang Wang ◽  
Yue Zhao ◽  
Zhen Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Zno Films ◽  
Structure And Properties ◽  
Doped Zno ◽  
Co Doped

Room temperature ferromagnetism and structural characterization of Fe,Ni co-doped ZnO nanocrystals

2013 ◽  
Vol 287 ◽  
pp. 287-292 ◽  
Author(s):  
Pooja Dhiman ◽  
Khalid Mujasam Batoo ◽  
R.K. Kotnala ◽  
Jagdish Chand ◽  
M. Singh
Keyword(s):  
Structural Characterization ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Nanocrystals ◽  
Doped Zno ◽  
Co Doped

Hydrogenation-Induced Room-Temperature Ferromagnetism in Co-Doped ZnO Nanocrystals

2008 ◽  
Vol 47 (4) ◽  
pp. 3261-3263 ◽  
Author(s):  
Yi Wang ◽  
Lei Sun ◽  
Yan Li ◽  
Yi-Fan Zhang ◽  
De-Dong Han ◽  
...  
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Nanocrystals ◽  
Doped Zno ◽  
Co Doped

Hydrogenation Induced Room-Temperature Ferromagnetism in Co-doped ZnO Nanocrystals

2007 ◽  
Author(s):  
Yi Wang ◽  
Lei Sun ◽  
Yan Li ◽  
Yi-fan Zhang ◽  
De-dong Han ◽  
...  
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Nanocrystals ◽  
Doped Zno ◽  
Co Doped

scholarly journals Structure and properties of Co-doped ZnO films prepared by thermal oxidization under a high magnetic field

2015 ◽  
Vol 10 (1) ◽  
Author(s):  
Guojian Li ◽  
Huimin Wang ◽  
Qiang Wang ◽  
Yue Zhao ◽  
Zhen Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Zno Films ◽  
Structure And Properties ◽  
Doped Zno ◽  
Co Doped

Photoluminescence and Magnetic Properties of Undoped and (Mn, Co) co-doped ZnO Nanoparticles

2020 ◽  
Vol 16 (4) ◽  
pp. 655-666
Author(s):  
Mona Rekaby
Keyword(s):  
Magnetic Properties ◽  
Zno Nanoparticles ◽  
Room Temperature ◽  
Magnetic Measurements ◽  
Structural Defects ◽  
Ferromagnetic Behavior ◽  
Secondary Phases ◽  
Antiferromagnetic Ordering ◽  
Doped Zno ◽  
Co Doped

Objective: The influence of Manganese (Mn2+) and Cobalt (Co2+) ions doping on the optical and magnetic properties of ZnO nanoparticles was studied. Methods: Nanoparticle samples of type ZnO, Zn0.97Mn0.03O, Zn0.96Mn0.03Co0.01O, Zn0.95Mn0.03 Co0.02O, Zn0.93Mn0.03Co0.04O, and Zn0.91Mn0.03Co0.06O were synthesized using the wet chemical coprecipitation method. Results: X-ray powder diffraction (XRD) patterns revealed that the prepared samples exhibited a single phase of hexagonal wurtzite structure without any existence of secondary phases. Transmission electron microscope (TEM) images clarified that Co doping at high concentrations has the ability to alter the morphologies of the samples from spherical shaped nanoparticles (NPS) to nanorods (NRs) shaped particles. The different vibrational modes of the prepared samples were analyzed through Fourier transform infrared (FTIR) measurements. The optical characteristics and structural defects of the samples were studied through Photoluminescence (PL) spectroscopy. PL results clarified that Mn2+ and Co2+ doping quenched the recombination of electron-hole pairs and enhanced the number of point defects relative to the undoped ZnO sample. Magnetic measurements were carried out at room temperature using a vibrating sample magnetometer (VSM). (Mn, Co) co-doped ZnO samples exhibited a ferromagnetic behavior coupled with paramagnetic and weak diamagnetic contributions. Conclusion: Mn2+ and Co2+ doping enhanced the room temperature Ferromagnetic (RTFM) behavior of ZnO. In addition, the signature for antiferromagnetic ordering between the Co ions was revealed. Moreover, a strong correlation between the magnetic and optical behavior of the (Mn, Co) co-doped ZnO was analyzed.

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