scholarly journals Co and Cu co-doped ZnO epitaxial films—A magnetically soft nano-composite

2016 ◽  
Vol 119 (16) ◽  
pp. 163901 ◽  
Author(s):  
V. Ney ◽  
V. Venkataraman ◽  
B. Henne ◽  
K. Ollefs ◽  
F. Wilhelm ◽  
...  
Keyword(s):  
Epitaxial Films ◽  
Nano Composite ◽  
Doped Zno ◽  
Co Doped

Structural and magnetic properties of Co-doped ZnO epitaxial films

2007 ◽  
Vol 310 (2) ◽  
pp. 2089-2091 ◽  
Author(s):  
H.-J. Lee ◽  
S.-H. Lee ◽  
F. Yildiz ◽  
Y.H. Jeong
Keyword(s):  
Magnetic Properties ◽  
Epitaxial Films ◽  
Structural And Magnetic Properties ◽  
Doped Zno ◽  
Co Doped

Anisotropic paramagnetism of Co-doped ZnO epitaxial films

2010 ◽  
Vol 81 (5) ◽  
Author(s):  
A. Ney ◽  
T. Kammermeier ◽  
K. Ollefs ◽  
S. Ye ◽  
V. Ney ◽  
...  
Keyword(s):  
Epitaxial Films ◽  
Doped Zno ◽  
Co Doped

Co-Doped ZnO Epitaxial Films: From a Brillouin-Like Paramagnet to a Phase-Separated Superparamagnetic Ensemble

2010 ◽  
Vol 10 (9) ◽  
pp. 5958-5963 ◽  
Author(s):  
V. Ney ◽  
S. Ye ◽  
K. Ollefs ◽  
T. Kammermeier ◽  
F. Wilhelm ◽  
...  
Keyword(s):  
Epitaxial Films ◽  
Doped Zno ◽  
Co Doped

Raman scattering investigations on Co-doped ZnO epitaxial films: Local vibration modes and defect associated ferromagnetism

2014 ◽  
Vol 14 (5) ◽  
pp. 744-748 ◽  
Author(s):  
Qiang Cao ◽  
Shumin He ◽  
Yuanyuan Deng ◽  
Dapeng Zhu ◽  
Xiaodong Cui ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Epitaxial Films ◽  
Vibration Modes ◽  
Local Vibration ◽  
Doped Zno ◽  
Co Doped

Influence of N Dopant on the Electric and Magnetic Properties of Co Doped ZnO Thin Films

2010 ◽  
Vol 25 (7) ◽  
pp. 711-716 ◽  
Author(s):  
Xue-Tao WANG ◽  
Li-Ping ZHU ◽  
Zhi-Gao YE ◽  
Zhi-Zhen YE ◽  
Bing-Hui ZHAO
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Zno Thin Films ◽  
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.

Optimizing physical properties of Co-doped ZnO nanoparticles: Controlling oxygen vacancy and carrier concentration

Vacuum ◽  
2021 ◽  
pp. 110488
Author(s):  
Huying Yan ◽  
Jian Xue ◽  
Wenjing Chen ◽  
Jialing Tang ◽  
Ling zhong ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Physical Properties ◽  
Carrier Concentration ◽  
Zno Nanoparticles ◽  
Doped Zno ◽  
Co Doped

Transport mechanisms in Co-doped ZnO (ZCO) and H-irradiated ZCO polycrystalline thin films

2021 ◽  
Vol 23 (3) ◽  
pp. 2368-2376
Author(s):  
A. Di Trolio ◽  
A. Amore Bonapasta ◽  
C. Barone ◽  
A. Leo ◽  
G. Carapella ◽  
...  
Keyword(s):  
Thin Films ◽  
Opposite Effect ◽  
Transport Mechanisms ◽  
Co Doping ◽  
Polycrystalline Thin Films ◽  
Doped Zno ◽  
Co Doped

Co doping increases the ZnO resistivity (ρ) at high T (HT), whereas it has an opposite effect at low T (LT). H balances the Co effects by neutralizing the ρ increase at HT and strengthening its decrease at LT.

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