A Review on Chemical Synthesis, Characterization and Optical Properties of Nanocrystalline Transition Metal Doped Dilute Magnetic Semiconductors

2013 ◽  
Vol 201 ◽  
pp. 103-129 ◽  
Author(s):  
Tokeer Ahmad ◽  
Sarvari Khatoon ◽  
Ruby Phul
Keyword(s):  
Optical Properties ◽  
Transition Metal ◽  
Magnetic Semiconductors ◽  
Room Temperature Ferromagnetism ◽  
Magnetic Semiconductor ◽  
Dilute Magnetic Semiconductors ◽  
Exchange Interactions ◽  
Transition Metal Ions ◽  
Modern Technology ◽  
Metal Doped

Nanomaterials have fascinated researchers in recent years because these materials exhibit unusual optical, magnetic and electrical properties as compared to their bulk counterparts. Incorporating impurity ions into a semiconducting host to extend its properties has been one of the most important techniques that paved the way for the modern technology based on spintronic devices. Over the past few years, oxide based dilute magnetic semiconductors (DMSs) have gained remarkable interest due to the possibility of inducing room temperature ferromagnetism. This review describes the experimental developments and optical properties of oxide based DMSs, including the recent results on ZnO, CdO and In2O3 based systems. Optical properties of transition metal (TM)-doped ZnO, CdO and In2O3 dilute magnetic semiconductor nanoparticles show red shift in energy band gaps. Such types of phenomena are attributed to sp-d exchange interactions between band electrons and localized d-electrons of the substituted transition metal ions. Table of Contents

Magneto-transport Properties of Cobalt doped Indium Oxide Dilute Magnetic Semiconductors

2007 ◽  
Vol 1032 ◽  
Author(s):  
N. Mamidi ◽  
R. K. Gupta ◽  
K. Ghosh ◽  
S. R. Mishra ◽  
P. K. Kahol
Keyword(s):  
Optical Properties ◽  
Hall Effect ◽  
Oxygen Pressure ◽  
Growth Temperature ◽  
Magnetic Semiconductors ◽  
Room Temperature Ferromagnetism ◽  
Dilute Magnetic Semiconductors ◽  
Hall Effect Measurement ◽  
Optical Transparency ◽  
Spintronic Devices

AbstractRecently, oxide-based dilute magnetic semiconductors (DMS) have attracted an immense research interest to the scientists due to the possibility of inducing room temperature ferromagnetism and potential uses in novel spintronic devices. In2O3, a transparent opto-electronic material, is an interesting prospect for spintronics due to its unique combination of magnetic, electrical, and optical properties. High quality thin films of Co-doped In2O3 DMS were grown on quartz substrates using pulsed laser deposition technique. All the films have been characterized using different techniques such as x-ray diffraction, Raman spectroscopy, optical transmission spectroscopy, electrical resistivity, and Hall Effect measurement. The effect of growth temperature and oxygen pressure on the electrical, magnetic, and optical properties of these films have been studied in detail. The optical transparency in all the films is high. It has been observed that the optical transparency depends on growth temperature and oxygen pressure. The electrical parameters such as resistivity, carrier concentration, and mobility strongly depend on both oxygen pressure and growth temperature. The films grown at low temperature are semiconducting in nature while the films grown at high temperature are metallic. Detailed temperature and magnetic field dependent resistivity, magnetoresistance, and Hall effect data will be presented. This work is supported by Research Corporation (award number CC6166).

scholarly journals Room temperature ferromagnetism in metallic Ti1−xVxO2 thin films

RSC Advances ◽  
2018 ◽  
Vol 8 (55) ◽  
pp. 31382-31387 ◽  
Author(s):  
Ze-Ting Zeng ◽  
Feng-Xian Jiang ◽  
Li-Fei Ji ◽  
Hai-Yun Zheng ◽  
Guo-Wei Zhou ◽  
...  
Keyword(s):  
Thin Films ◽  
Transition Metal ◽  
Room Temperature ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Room Temperature Ferromagnetism ◽  
Diluted Magnetic ◽  
Metal Doped

Transition metal doped TiO2 diluted magnetic semiconductors have attracted considerable interest due to their room temperature ferromagnetism.

scholarly journals Origin of transition metal clustering tendencies in GaAs based dilute magnetic semiconductors

2005 ◽  
Vol 86 (17) ◽  
pp. 172504 ◽  
Author(s):  
Priya Mahadevan ◽  
J. M. Osorio-Guillén ◽  
Alex Zunger
Keyword(s):  
Transition Metal ◽  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors

Room temperature ferromagnetism in III–V and II–IV–V2 dilute magnetic semiconductors

2006 ◽  
Vol 374-375 ◽  
pp. 430-432 ◽  
Author(s):  
V.G. Storchak ◽  
D.G. Eshchenko ◽  
H. Luetkens ◽  
E. Morenzoni ◽  
R.L. Lichti ◽  
...  
Keyword(s):  
Room Temperature ◽  
Magnetic Semiconductors ◽  
Room Temperature Ferromagnetism ◽  
Dilute Magnetic Semiconductors

Effects of free carriers on the optical properties of high mobility transition metal doped In2O3 transparent conductors

2021 ◽  
Vol 5 (9) ◽  
Author(s):  
Kingsley O. Egbo ◽  
Ayotunde E. Adesina ◽  
Chioma V. Ezeh ◽  
Chao Ping Liu ◽  
Kin Man Yu
Keyword(s):  
Optical Properties ◽  
Transition Metal ◽  
High Mobility ◽  
Transparent Conductors ◽  
Free Carriers ◽  
Metal Doped

scholarly journals Synthesis and Characterization of Sodium Bis(2-ethylhexyl) Sulfonsuccinate (AOT) Capped Pure and Mn-Doped CdS Nanoparticles

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
D. Venkatesan ◽  
D. Deepan ◽  
J. Ramkumar ◽  
S. Moorthy Babu ◽  
R. Dhanasekaran
Keyword(s):  
Thin Films ◽  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
Transition Metal Ions ◽  
Hexagonal Structure ◽  
Cds Nanoparticles ◽  
Sem Images ◽  
Semiconducting Properties ◽  
Mn Doped

CdS nanoparticles and thin films are well known for their excellent semiconducting properties. When transition metal ions are doped into the CdS, it exhibits magnetic properties in addition to semiconducting properties and they are termed as dilute magnetic semiconductors (DMSs). In this paper, we discuss the preparation of sodium bis(2-ethylhexyl) sulfonsuccinate (AOT) capped CdS nanoparticles and thin films doped with magnetic impurity Mn. Sodium bis(2-ethulexyl) sulfonsuccinate (AOT), capping agent promotes the uniform formation of nanoparticles. Optical characterizations are made using the UV-Vis spectrometer, PL, and FTIR. XRD shows the hexagonal structure of the CdS. SEM images and EDS measurements were made for the thin films. EPR shows the clear hyperfine lines corresponding to Mn2+ion in the CdS nanoparticles.

Sign in / Sign up

Export Citation Format

Share Document