scholarly journals Role of the microstructure on the magnetic properties of Co-doped ZnO nanoparticles

2005 ◽  
Vol 86 (10) ◽  
pp. 103113 ◽  
Author(s):  
B. Martínez ◽  
F. Sandiumenge ◽  
Ll. Balcells ◽  
J. Arbiol ◽  
F. Sibieude ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Zno Nanoparticles ◽  
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.

Magnetic properties of Co-doped ZnO nanoparticles prepared by vaporization-condensation in a solar reactor

2005 ◽  
Vol 97 (10) ◽  
pp. 10D311 ◽  
Author(s):  
B. Martínez ◽  
F. Sandiumenge ◽  
Ll. Balcells ◽  
J. Fontcuberta ◽  
F. Sibieude ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Zno Nanoparticles ◽  
Solar Reactor ◽  
Doped Zno ◽  
Co Doped

Structure, photoluminescence, and magnetic properties of Co-doped ZnO nanoparticles

2018 ◽  
Vol 29 (15) ◽  
pp. 12917-12926 ◽  
Author(s):  
Hongfen Ji ◽  
Changlong Cai ◽  
Shun Zhou ◽  
Weiguo Liu
Keyword(s):  
Magnetic Properties ◽  
Zno Nanoparticles ◽  
Doped Zno ◽  
Co Doped

scholarly journals Structure and magnetic properties of Co-doped ZnO nanoparticles

2005 ◽  
Vol 72 (16) ◽  
Author(s):  
B. Martínez ◽  
F. Sandiumenge ◽  
Ll. Balcells ◽  
J. Arbiol ◽  
F. Sibieude ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Zno Nanoparticles ◽  
Doped Zno ◽  
Co Doped

Synthesis of Co-doped ZnO nanoparticles via co-precipitation: Structural, optical and magnetic properties

2015 ◽  
Vol 286 ◽  
pp. 757-765 ◽  
Author(s):  
S. Fabbiyola ◽  
L. John Kennedy ◽  
Udaya Aruldoss ◽  
M. Bououdina ◽  
A.A. Dakhel ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Zno Nanoparticles ◽  
Optical And Magnetic Properties ◽  
Doped Zno ◽  
Co Precipitation ◽  
Co Doped
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