Dissertation > Excellent graduate degree dissertation topics show

Preparation and Characteristic of BiFeO3 /Bi3.25 La 0.75 Ti3O12 Multiferroic Bi-layer Films

Author: LiYuBin
Tutor: YuJun
School: Huazhong University of Science and Technology
Course: Microelectronics and Solid State Electronics
Keywords: Multiferroic materials Iron - bismuth Sol - gel RF magnetron sputtering BFO / BLT Bilayers
CLC: O484.4
Type: Master's thesis
Year: 2011
Downloads: 23
Quote: 0
Read: Download Dissertation

Abstract


In recent years, multiferroic materials simultaneously ferroelectric and ferromagnetic become the focus of people 's studies , is considered to have broad application prospects in the field of information storage and spintronic devices , sensors . Single-phase multiferroic materials the BiFeO 3 ( BFO) , very few have both ferroelectric and ferromagnetic material at room temperature , people of all ages . This thesis is based on the BFO target and thin film conditions , performance testing , characterization , and further explore the BFO / BLT bilayer film preparation process with multi- iron performance . Used for the the BFO material sensitive to temperature and difficult to obtain pure sample prepared BFO target improved solid phase sintering process , the rapid warming during the heating process , rapidly heated to 820 ° C down to room temperature and keep after 20min . Because heating quickly , skipping the the BFO material is extremely sensitive to the temperature of the interval , thus avoiding the hetero - phase formation . BFO target sputtering can be used on the basis of the successful preparation of the pure phase BFO thin films prepared by magnetron sputtering , BFO thin films prepared by magnetron sputtering process by adjusting the process parameters . Pt / TiO 2 / SiO 2 / p - Si ( 100 ) substrate BLT ferroelectric films prepared by sol - gel method . Film were randomly oriented , no heteroaryl phase generated ; and has good ferroelectric performance , 2Pr 36.4μC/cm 2 , 2Ec approximately 246 kV / cm . By preparing BFO / BLT double-layer film structure to improve the film properties . BLT layer introduces a certain extent suppressed BFO in which a small amount of the impurity phase , and the phenomenon of the BFO film part of the abnormal grain growth is suppressed . Improve other reasons due to the uniformity of the compactness of the grains of the BFO film , film sample leakage current properties are improved , and the density decreased by one to two orders of magnitude of the leakage current . Due to leakage current density decreases , the sample can withstand higher test voltage without breakdown saturated ferroelectric hysteresis loops , ferroelectricity has been greatly improved , 2Pr 12.4μC/cm2 .

Related Dissertations

  1. Preparation and Photocatalytic Properties for Water Decomposition of Titanate Photocatalyst,O643.36
  2. Preparation of ITO Quai-1D Nanostructures by Sol-Gel Method Combined with Porous Anodic Aluminum Oxide Template,TB383.1
  3. Study on the Synthesis Bi3.25La0.75Ti3O12（BLT） Nanotubes and Nano Wires,TB383.1
  4. Preparation and Electrocaloric Effect of BaxSr1-xTiO3 Ferroelectric Thin Films,TB383.2
  5. Preparation and Performance of V2O5-WO3/MOx/Cordierite Catalyst Modified with Cu、Mn、Ce for DeNOx,X701
  6. LSGM electrolyte thin films and electrochemical properties of,TM911.4
  7. Iron, lanthanum -doped nano TiO \u003csub\u003e 2 \u003c/ sub\u003e Preparation and photocatalytic properties,O614.411
  8. Preparation of Silica Hollow Spheres with Mesopores in the Walls,TB383.1
  9. Fabrications and Applications of Microelectrode Array of Silicon Dioxide Cavities and Magnetic Ferroferric Oxide Nano-Bioconjunctions,TB383.1
  10. The Research on Preparation Technology and Sintering Behavior of Rare Earth Aluminates (Dy3Al5O12、 NdAlO3、LaAl11O18),TB383.3
  11. Studies of High Refractive Index Materials Prepared by Nano ZrO2 and TiO2 Hybrid Silicone Epoxy Resin,TB383.1
  12. Preparation and Characterization of Al2O3/C Hybrid Aerogels and Al2O3 Aerogels,O648.17
  13. The Study on Properties of Desulfurization and Denitrification by Mn/Al Catalysts,X773
  14. Investigation into ZnO Thin Film Transistors Prepared by Sol-gel Method,TN321.5
  15. Sol - gel method p -type ZnO films,O484.1
  16. Storage-stable organic / inorganic hybrid polymers and their light-cured coating application,TQ630.4
  17. Boron nitride fiber reinforced ceramic matrix composites through the waves and Properties,TB332
  18. Sol - gel preparation and properties of aluminum ion - doped zinc oxide films,TB383.2
  19. PS/SiO_2 core-shell composite microspheres,TB383.4
  20. Study on the Structure and Magnetic Properties of K-doped SnO2 and V-doped ZnO Diluted Magnetic Semiconductor Powders,TB383.1

CLC: > Mathematical sciences and chemical > Physics > Solid State Physics > Thin Film Physics > The nature of the films
© 2012 www.DissertationTopic.Net  Mobile