Optical Properties and Ferromagnetism of Fe and Ni Co-doped ZnO Dilute Magnetic Semiconductors

2014 ◽  
Vol 35 (2) ◽  
pp. 178-183
Author(s):  
魏智强 WEI Zhi-qiang ◽  
张玲玲 ZHANG Ling-ling ◽  
武晓娟 WU Xiao-juan ◽  
吴永富 WU Yong-fu ◽  
王璇 WANG Xuan
Keyword(s):  
Optical Properties ◽  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
Doped Zno ◽  
Co Doped

EFFECTS OF OXYGEN VACANCY ON MAGNETIC PROPERTIES OF COBALT-DOPED ZnO DILUTE MAGNETIC SEMICONDUCTORS

2013 ◽  
Vol 27 (17) ◽  
pp. 1350078 ◽  
Author(s):  
H. L. TAO ◽  
Z. H. ZHANG ◽  
L. L. PAN ◽  
M. HE ◽  
B. SONG ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Oxygen Vacancy ◽  
Fermi Level ◽  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
First Principle ◽  
Doped Zno ◽  
Valence Bands ◽  
Formation Energies ◽  
Co Doped

Effects of oxygen vacancy (Vo) on magnetic properties of Co -doped ZnO are investigated by first principle calculations. The calculated formation energies of Vo with different bonding to Co atom indicate that Vo prefers location near Co atom, implying a strong local interaction between the Co atom and O -vacancy. Induced by Vo, the Co -3d and O -2p valence bands upward shift towards the Fermi level, leading to the presence of additional carriers at the Fermi level. The delocalized carriers and the substitutional Co ion play a key role in the occurrence and stability of ferromagnetism of Co -doped ZnO .

Magnetic and Electronic Properties of n-type (Al,Ga) co-doped Zn(Cu)O based Dilute Magnetic Semiconductors

2007 ◽  
Vol 999 ◽  
Author(s):  
Deepayan Chakraborti ◽  
John T. Prater ◽  
Jagdish Narayan
Keyword(s):  
Thin Films ◽  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
Magnetic Polaron ◽  
F Center ◽  
Doped Zno ◽  
Ferromagnetic Ordering ◽  
Semiconducting Thin Films ◽  
Ga Doping ◽  
Co Doped

AbstractSystematic studies on the epitaxial growth and the effect of n-type (Al,Ga) doping on the magnetic and electrical properties of 2.0 % Cu doped ZnO dilute magnetic semiconducting thin films deposited on c-plane sapphire single crystals by pulsed laser deposition are reported here. An decrease in more than 3 orders of magnitude in resistivity from 2×101 Ohm cm for the 2.0 % Cu doped ZnO to ~5×10-3 Ohm cm for Al and Ga codoped films is observed. This increase in conductivity does not show any effect on ferromagnetic ordering thus contradicting the claim of free carrier mediated exchange as being responsible for ferromagnetic ordering in these DMS systems. A bound magnetic polaron or F-center mediated exchange is a possible explanation for the origin of ferromagnetism in these ZnO based DMS thin films.

Synthesis and optical properties of Co-doped ZnO nanofibers prepared by electrospinning

Optik ◽  
2014 ◽  
Vol 125 (10) ◽  
pp. 2361-2364 ◽  
Author(s):  
Huawa Yu ◽  
Huiqing Fan ◽  
Xin Wang ◽  
Jing Wang
Keyword(s):  
Optical Properties ◽  
Zno Nanofibers ◽  
Doped Zno ◽  
Co Doped

scholarly journals Electronic Structure and Optical Properties of Co and Fe Doped ZnO

2016 ◽  
Vol 43 ◽  
pp. 23-28 ◽  
Author(s):  
Chun Ping Li ◽  
Ge Gao ◽  
Xin Chen
Keyword(s):  
Density Functional Theory ◽  
Optical Properties ◽  
Electronic Structures ◽  
Density Functional ◽  
Band Gaps ◽  
First Principle ◽  
Functional Theory ◽  
Doped Zno ◽  
Pseudo Potential ◽  
Co Doped

First-principle ultrasoft pseudo potential approach of the plane wave based on density functional theory (DFT) has been used for studying the electronic characterization and optical properties of ZnO and Fe, Co doped ZnO. The results show that the doping impurities change the lattice parameters a little, but bring more changes in the electronic structures. The band gaps are broadened by doping, and the Fermi level accesses to the conduction band which will lead the system to show the character of metallic properties. The dielectric function and absorption peaks are identified and the changes compared to pure ZnO are analyzed in detail.

scholarly journals Correction: Optical properties and carrier dynamics in Co-doped ZnO nanorods

2021 ◽  
Author(s):  
Aswathi K. Sivan ◽  
Alejandro Galán-González ◽  
Lorenzo Di Mario ◽  
Nicolas Tappy ◽  
Javier Hernández-Ferrer ◽  
...  
Keyword(s):  
Optical Properties ◽  
Zno Nanorods ◽  
Carrier Dynamics ◽  
Doped Zno ◽  
Co Doped

Correction for ‘Optical properties and carrier dynamics in Co-doped ZnO nanorods’ by Aswathi K. Sivan et al., Nanoscale Adv., 2021, DOI: 10.1039/d0na00693a.

Magnetic and optical properties of Co-doped ZnO nanorod arrays

2020 ◽  
Vol 135 (1) ◽  
Author(s):  
Wei Wang ◽  
Fuchun Zhang ◽  
Xiaoyang Wang ◽  
Shuili Zhang ◽  
Junfeng Yan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Doped Zno ◽  
Co Doped
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