Dissertation > Excellent graduate degree dissertation topics show

The Properties of Diluted Magnetic Semiconductors with Fe, Co Co-doped TiO2

Author: WangTaoTao
Tutor: JiangDongMei
School: East China Normal University
Course: Materials Physics and Chemistry
Keywords: Diluted magnetic semiconductors Sol-gel method Oxygen vacancy The bound magnetopolaron theory (BMPs)
CLC: TN304
Type: Master's thesis
Year: 2010
Downloads: 63
Quote: 0
Read: Download Dissertation

Abstract


In recent years, with the emerging of new materials of diluted magnetic semiconductor (DMS) , and its development is very rapid , dilute magnetic semiconductor ordinary semiconductors do not have the advantage , so , it has enormous potential practical application . The paper briefly describes the principles and characteristics of diluted magnetic semiconductor , and at this stage of the latest progress of the diluted magnetic semiconductor research . In this paper, the sol-gel method prepared Fe and Co codoped TiO2 powder material . Followed by X-ray diffraction of diluted magnetic semiconductor materials characterization results show that Fe , Co doping can be better integrated into the TiO2 lattice , no obvious phase separation , and when the Fe / Co doping ratio close weakening greatest extent TiO2 matrix --- anatase crystallinity . Using a vibrating sample magnetometer on the magnetic properties of the sample can be tested , and found that when the Fe / Co doping ratio of 2:3 and 3:2 , the sample has a strength much greater than the magnetic properties of other Fe / Co doping ratio . To the bound magnetopolaron theory (BMPs) explained that this is because the number of oxygen vacancies in the sample maximum , this explanation at the same time confirmed the results of the PL spectra . In addition , the case of nitrogen annealed sample magnetic will be greatly enhanced, hypoxia annealing led to a large number of oxygen vacancies in the sample sake .

Related Dissertations

  1. The Study on Properties of Desulfurization and Denitrification by Mn/Al Catalysts,X773
  2. Preparation and Properties of ZnO-based Diluted Magnetic Semiconductors,TN304.21
  3. The Study of Si Surface Adsorption and Magnetism of Si-Doped Defect in GaN,TN304.12
  4. Sol - gel method p -type ZnO films,O484.1
  5. Doped ZnO thin film magnetic materials Preparation and magnetic properties at room temperature,O484.1
  6. First-principles Calculation of Magnetic Properties in ZnO-based Diluted Magnetic Semiconductors,O484.43
  7. Study on the Structure and Magnetic Properties of K-doped SnO2 and V-doped ZnO Diluted Magnetic Semiconductor Powders,TB383.1
  8. Study on the Preparion and Photo-catalytic Capability of Metal Ion Doped Nano Zinc Oxide,O643.36
  9. Dilute magnetic semiconductor GaN: Mn (?) Film First Principle Studies,O484
  10. Research on Removal of Fluorine Ion from Wastewater by Nano-Hydroxyapatite,X703
  11. Photoluminescence Character and Thermal Application of Rare Earth （Dy, Nd, Yb, Er） Co-doped Al2O3,O482.31
  12. Study on the Synthesis and Physical Properties of Co-Doped ZnO Crystals,TB383.1
  13. Preparation and Studies on Capacitance Performance of Manganites and Doped Manganites,TM912
  14. Preparation of Rare Earth Solid Superacid and Catalysis on the Esterification Reactions,TQ203.2
  15. Study of MTMS-based Hydrophobic Silica Aerogels Prepared via Ambient Pressure Drying and Its Reinforcing Modification,O613.72
  16. Sol-Gel Synthesis of Nano-sized Phosphors and Their Properties,TB383.1
  17. Technology and Properties of vanadium oxide thin films,TB383.2
  18. Study on the Synthesis Bi3.25La0.75Ti3O12（BLT） Nanotubes and Nano Wires,TB383.1
  19. Synthesis and Property of Semiconductor Nanomaterial and Composite Nanomaterial,TB383.1
  20. Double-doped ceria electrolyte materials,TM911.4
  21. Preparation of Nano Carbon White from Flyash by New Gas-sol-gel,TQ127.2

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Semiconductor technology > General issues > Material
© 2012 www.DissertationTopic.Net  Mobile