Ferromagnetism in Dilute Magnetic Semiconductors through Defect Engineering: Li-Doped ZnO

Colloidal ZnO nanocrystals are promising for a wide range of applications due to the combination of unique multifunctional nature and remarkable solution processability. Doping is an effective approach of enhancing the properties of colloidal ZnO nanocrystals in well-controlled manners. In this paper, we analyzed two synthetic strategies for the doped colloidal ZnO nanocrystals, emphasizing our understanding on the critical factors associated with the high temperature and nonaqueous approach. Latest advances of three topics, bandgap engineering, n-type doping, and dilute magnetic semiconductors related to doped ZnO nanocrystals were discussed to reveal the effects of dopants on the properties of the nanocrystalline materials.

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Dilute Magnetic Semiconductors: ab initio Studies of V doped ZnO

ECS Transactions ◽

10.1149/1.3701530 ◽

2012 ◽

Vol 45 (7) ◽

pp. 97-108

Author(s):

P. Dunne ◽

M. Uhlemann ◽

A. Gebert ◽

L. Schultz

Keyword(s):

Ab Initio ◽

Magnetic Semiconductors ◽

Dilute Magnetic Semiconductors ◽

Doped Zno

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

International Journal of Modern Physics B ◽

10.1142/s0217979213500781 ◽

2013 ◽

Vol 27 (17) ◽

pp. 1350078 ◽

Cited By ~ 1

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 .

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Local Structural Analysis for Mn-Doped ZnO Dilute Magnetic Semiconductors

Japanese Journal of Applied Physics ◽

10.7567/jjap.52.10mc01 ◽

2013 ◽

Vol 52 (10S) ◽

pp. 10MC01

Author(s):

Dong-Seok Yang ◽

Hee Jae Kang

Keyword(s):

Structural Analysis ◽

Magnetic Semiconductors ◽

Dilute Magnetic Semiconductors ◽

Doped Zno ◽

Mn Doped

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Synthesis and Characterization of Nickel-Doped ZnO Nanocrystals

MRS Proceedings ◽

10.1557/proc-0957-k10-24 ◽

2006 ◽

Vol 957 ◽

Cited By ~ 2

Author(s):

Xiao Li Zhang ◽

Ru Qiao ◽

Yan Li ◽

Ri Qiu ◽

Young Soo Kang

Keyword(s):

Solid Solution ◽

Magnetic Semiconductors ◽

Synthesis Method ◽

Dilute Magnetic Semiconductors ◽

Hysteresis Loops ◽

Alcoholic Solution ◽

Transmission Electron Micrograph ◽

Zno Nanocrystals ◽

Doped Zno ◽

The One

ABSTRACTThe structure and magnetism of ZnO-based solid solutions, dilute magnetic semiconductors, with nickel solute were obtained via a solvothermal method. Compared with previous methods for solid solution DMSs, our synthesis method was really facile and economical. The one-dimensional solid solution of Zn1-xNixO nanostructures were grown in a alcoholic solution. Moreover, the percentage of doped nickel can be easily controlled. The X-ray diffraction, transmission electron micrograph and magnetization hysteresis loops of nickel-doped ZnO nanocrystals were presented to confirm that the nickel impurities are embedded inside the nanocrystal.

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