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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Effects of geometric variation and residual stress on the dynamic response of multilayerd thin membrane structures

Han, Tai Chun, January 2007 (has links) (PDF)
Thesis (M.S.)--Washington State University, July 2007. / Includes bibliographical references (p. 81-83).
22

A study of the kinetics and microstructure evolution during reactions of niobium/aluminum and titanium/aluminum multilayer thin-films /

Lucadamo, Gene A. January 1999 (has links)
Thesis (Ph. D.)--Lehigh University, 2000. / Includes vita. Includes bibliographical references (leaves 363-382).
23

A microcomputer program for optical multilayer thin films

Betts, Kevin Howard January 1985 (has links)
A microcomputer software package was written to calculate the tranmission and reflection characteristics of multilayer thin films on a substrate. The program was written to be as "user-friendly", versatile and modular as possible. To test the program, a transparent oxide-type heat-mirror film capped with an antireflection coating was studied for greenhouse applications. Si0₂ and ZnO were considered as representative antireflection and heat-mirror materials respectively. The results of calculations of heat transfer coefficient and transmittance of the glazing construction polyethylene/air gap/Si0₂/ZnO/polyethylene are presented. The resulting structure is shown to give a visible light transmission spectrum which closely matches the plant sensitivity curve for plant growth and has higher thermal insulation compared to uncoated polyethylene. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
24

CHARACTERIZATION OF THE OPTICAL PROPERTIES OF SOME TRANSITION METAL CARBIDES AND NITRIDES

Shimshock, Richard Paul, 1954- January 1987 (has links)
We established measurement and analysis techniques necessary to investigate the optical properties of some transition metal compounds: specifically the carbides and nitrides of Ti, Zr, and Hf. Two distinct techniques determined the optical constants of these films: a Nestell-Christy method to invert measurements of thickness, reflection, and transmission and a Kramers-Kronig analysis of reflection. The compositions of the samples were evaluated by X-ray diffraction, Auger spectroscopy, scanning electron microprobe analysis, and nuclear analysis. We found it possible to correlate these materials' optical and electronic properties and relate these to compositional changes. The ability to engineer a specific optical response of materials is discussed. Additions of carbon and nitrogen change the optical properties in a specific manner; the roles of these elements as electron donors and their effect on the location and population of the d electron bands with respect to the Fermi level are postulated.
25

The preparation and characterisation of novel organo-ruthenium Langmuir-Blodgett films

Richardson, Tim January 1989 (has links)
In recent years, there has been considerable interest in media which exhibit significant non-linear physical properties. The non-linear optical response of many materials has attracted a great deal of attention from the telecommunications industry owing to their possible use for signal processing applications. Also, applications such as thermal imaging depend ultimately upon the proficient operation of the active material within the device structure. Traditionally, inorganic materials such as lithium niobate and strontium barium niobate have been used for non-linear optics and infra-red detection. However, the last decade or so has exposed the potentially high efficiency offered by organic materials which, coupled to the ability to engineer their physical properties by subtle modifications at the molecular level, suggests an exciting and productive future. In order to maintain compatibility with existing integrated optics and display technologies, it is often useful to process the active compound in thin film form. The stringent symmetry requirements imposed upon the molecules and their organisation in the macroscopic structure necessitates the existence of non-centrosymmetric molecular structures for second-order non-linear applications such as those mentioned above. The Langmuir-Blodgett deposition technique enables such assemblies to be constructed by the sequential transfer of organic monomolecular layers from a liquid-air interface onto a solid substrate. The precise control of film thickness and molecular architecture afforded by the technique allow polar multilayer structures to be produced which possess the properties required for highly efficient second-order non-linear physical operation. This thesis describes the development of a series of novel organo-metallic complexes which possess the necessary molecular properties for LB deposition in addition to those required for the observation of a large non-linear response. The complexes offer substantially improved thermal stability over other LB materials, and are thus appealing to the industrial device engineer. Their physical properties have been systematically studied and related to their detailed molecular structure. In particular, optical second-harmonic generation studies have shown that they possess high molecular coefficients and have provided a launching stage for further development. Their high pyroelectric response has attracted much enthusiasm from both industry and academia because of their potential commercial exploitation in thermal imaging devices.
26

Annealing effects in La₂/₃Ca₁/₃MnO₃/Pr₂/₃Ca₁/₃MnO₃ multilayers =: 熱處理對La₂/₃Ca₁/₃MnO₃/Pr₂/₃Ca₁/₃MnO₃多層薄膜特性之影響. / 熱處理對La₂/₃Ca₁/₃MnO₃/Pr₂/₃Ca₁/₃MnO₃多層薄膜特性之影響 / Annealing effects in La₂/₃Ca₁/₃MnO₃/Pr₂/₃Ca₁/₃MnO₃ multilayers =: Re chu li dui La₂/₃Ca₁/₃MnO₃/Pr₂/₃Ca₁/₃MnO₃ duo ceng bo mo te xing zhi ying xiang. / Re chu li dui La₂/₃Ca₁/₃MnO₃/Pr₂/₃Ca₁/₃MnO₃ duo ceng bo mo te xing zhi ying xiang

January 2002 (has links)
by Lee Koon Ho. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2002. / Includes bibliographical references. / Text in English; abstracts in English and Chinese. / by Lee Koon Ho. / Acknowledgements --- p.i / Abstract --- p.ii / 論文摘要 --- p.iii / Table of Contents --- p.iv / List of Figures --- p.vi / List of Tables --- p.ix / Chapter Chapter I --- Introduction / Chapter 1.1 --- Review of magnetoresistance --- p.1 -1 / Chapter 1.1.1 --- Colossal magnetoresistance in rare earth manganites --- p.1 -2 / Chapter 1.1.2 --- Review of manganite multilayer system --- p.1-10 / Chapter 1.2 --- Research motivation --- p.1-12 / Chapter 1.2.1 --- Scope of the thesis --- p.1-14 / Reference --- p.1-15 / Chapter Chapter II --- Instrumentation --- p.2-1 / Chapter 2.1 --- Facing target sputtering system --- p.2-1 / Chapter 2.1.1 --- Preparation of LCMO/PCMO multilayer thin film --- p.2-3 / Chapter 2.2 --- Annealing system --- p.2-5 / Chapter 2.2.1 --- Oxygen post-annealing system --- p.2-5 / Chapter 2.2.2 --- Vacuum annealing system --- p.2-7 / Chapter 2.3 --- X-ray diffraction (XRD) --- p.2-9 / Reference --- p.2-11 / Chapter Chapter III --- Annealing of LCMO/PCMO multilayer thin films --- p.3-1 / Chapter 3.1 --- Oxygen post-annealing of LCMO/PCMO multilayer thin film --- p.3-1 / Chapter 3.1.1 --- Introduction to post-annealing of managanites oxides --- p.3-1 / Chapter 3.1.2 --- LCMO and PCMO Single Layer Films Description --- p.3-1 / Chapter 3.1.3 --- Selection of PCMO --- p.3-5 / Chapter 3.1.4 --- La2/3Ca1/3MnO3/ Pr2/3Ca1/3MnO3 Multilayer Description --- p.3-5 / Chapter 3.1.5 --- Oxygen post-annealing condition --- p.3-9 / Chapter 3.1.6 --- Oxygen post annealing of P100 --- p.3-9 / Chapter 3.1.7 --- Conclusion --- p.3-16 / Chapter 3.2 --- Vacuum annealing of LCMO/PCMO multilayer thin films --- p.3-19 / Chapter 3.2.1 --- Introduction --- p.3-19 / Chapter 3.2.2 --- Sample description --- p.3-20 / Chapter 3.2.3 --- Vacuum annealing condition --- p.3-21 / Chapter 3.2.4 --- Vacuum Annealing of LCMO and PCMO --- p.3-23 / Chapter 3.2.5 --- Vacuum Annealing of LCMO/PCMO multilayer thin films --- p.3-29 / Chapter 3.2.6 --- Conclusion --- p.3-49 / References --- p.3-50 / Chapter Chapter IV --- Activation energy of small polaron in LCMO/PCMO multilayer thin films --- p.4-1 / Chapter 4.1 --- Introduction to small lattice polarons --- p.4-1 / Chapter 4.2 --- Theory of small polarons --- p.4-2 / Chapter 4.3 --- Activation energy of small polaron --- p.4-3 / Chapter 4.4 --- Discussion --- p.4-7 / References --- p.4-8 / Chapter Chapter V --- Conclusions --- p.5-1
27

Colossal magnetoresistance of La₀.₄Ca₀.₆MnO₃/La₀.₈Ca₀.₂MnO₃ multilayers. / La₀.₄Ca₀.₆MnO₃/La₀.₈Ca₀.₂MnO₃多層薄膜之龐磁阻 / Colossal magnetoresistance of La₀.₄Ca₀.₆MnO₃/La₀.₈Ca₀.₂MnO₃ multilayers. / La₀.₄Ca₀.₆MnO₃/La₀.₈Ca₀.₂MnO₃ duo ceng bo mo zhi pang ci zu

January 2006 (has links)
Ng Ka Shun = La₀.₄Ca₀.₆MnO₃/La₀.₈Ca₀.₂MnO₃多層薄膜之龐磁阻 / 吳家信. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2006. / Includes bibliographical references. / Text in English; abstracts in English and Chinese. / Ng Ka Shun = La₀.₄Ca₀.₆MnO₃/La₀.₈Ca₀.₂MnO₃ duo ceng bo mo zhi pang ci zu / Wu Jiaxin. / Acknowledgements --- p.i / Abstract --- p.ii / 論文摘要 --- p.iii / Table of Contents --- p.iv / List of Figures --- p.vi / List of Tables --- p.viii / Chapter Chapter 1 --- Introduction / Chapter 1.1 --- Review of magnetresistance --- p.1-1 / Chapter 1.2 --- Colossal magnetoresistance (CMR) --- p.1-4 / Chapter 1.3 --- Possible mechanism of CMR --- p.1-7 / Chapter 1.3.1 --- Double exchange --- p.1-7 / Chapter 1.3.2 --- Phase separation and percolation theory --- p.1-9 / Chapter 1.3.3 --- Current carrier density collapse --- p.1-12 / Chapter 1.4 --- Our motivation --- p.1-14 / Chapter 1.5 --- Brief review of several manganite multilayer systems --- p.1-15 / Chapter 1.6 --- Scope of this thesis work --- p.1-16 / References --- p.1-17 / Chapter Chapter 2 --- Instrumentation / Chapter 2.1 --- Thin film deposition --- p.2-1 / Chapter 2.1.1 --- Facing target sputtering (FTS) --- p.2-1 / Chapter 2.1.2 --- Connection of heating wires and thermocouple --- p.2-5 / Chapter 2.1.3 --- Vacuum system --- p.2-7 / Chapter 2.2 --- Annealing system --- p.2-9 / Chapter 2.3 --- Characterization --- p.2-11 / Chapter 2.3.1 --- X-ray diffraction (XRD) --- p.2-11 / Chapter 2.3.2 --- Resistance measurement --- p.2-13 / Chapter 2.3.3 --- Thickness estimation --- p.2-15 / References --- p.2-15 / Chapter Chapter 3 --- Growth and characterization of LCMO single layer thin film --- p.3-1 / Chapter 3.1 --- Fabrication and characterization of LCMO targets --- p.3-1 / Chapter 3.2 --- Preparation of LCMO thin film --- p.3-5 / Chapter 3.2.1 --- Deposition conditions --- p.3-5 / Chapter 3.2.2 --- Depostion procedure --- p.3-8 / Chapter 3.2.3 --- Characterization of single layer film --- p.3-9 / References --- p.3-12 / Chapter Chapter 4 --- La0.4Ca0.6MnO3 / La0.8Ca0.2MnO3 multilayers / Chapter 4.1 --- Sample preparation --- p.4-1 / Chapter 4.2 --- Results and discussion --- p.4-4 / Chapter 4.2.1 --- Structural characterization --- p.4-4 / Chapter 4.2.2 --- Transport properties --- p.4-10 / Chapter 4.3 --- Oxygen post-annealing of multilayer thin films --- p.4-13 / Chapter 4.3.1 --- Introduction --- p.4-13 / Chapter 4.3.2 --- Oxygen post-annealing conditions --- p.4-14 / Chapter 4.3.3 --- Results and discussion --- p.4-16 / Chapter 4.4 --- Conclusion --- p.4-26 / References --- p.4-27 / Chapter Chapter 5 --- Conclusion
28

Study of Ferromagnetism and superconductivity in layered YBCO/LCMO thin films: (YBCO/LCMO 薄膜的鐵磁與超導特性研究). / YBCO/LCMO 薄膜的鐵磁與超導特性研究 / CUHK electronic theses & dissertations collection / Study of Ferromagnetism and superconductivity in layered YBCO/LCMO thin films: (YBCO/LCMO bo mo de tie ci yu chao dao te xing yan jiu). / YBCO/LCMO bo mo de tie ci yu chao dao te xing yan jiu

January 2001 (has links)
Zhao Kun. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references. / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Mode of access: World Wide Web. / Abstracts in English and Chinese. / Zhao Kun.
29

Enhanced magnetoresistance in La₀.₆₇Ca₀.₃₃MnO₃/Pr₀.₆₇Ca0.33MnO₃ multilayers =: La0.67Ca0.33MnO3/Pr0.67Ca0.33MnO3多層薄膜的磁致電阻增强現象. / La0.67Ca0.33MnO3/Pr0.67Ca0.33MnO3多層薄膜的磁致電阻增强現象 / Enhanced magnetoresistance in La₀.₆₇Ca₀.₃₃MnO₃/Pr₀.₆₇Ca0.33MnO₃ multilayers =: La0.67Ca0.33MnO3/Pr0.67Ca0.33MnO3 duo ceng bo mo de ci zhi dian zu zeng qiang xian xiang. / La0.67Ca0.33MnO3/Pr0.67Ca0.33MnO3 duo ceng bo mo de ci zhi dian zu zeng qiang xian xiang

January 2001 (has links)
by Li Ho. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2001. / Includes bibliographical references. / Text in English; abstracts in English and Chinese. / by Li Ho. / Abstract --- p.i / 論文摘要 --- p.ii / Acknowledgements --- p.iii / Table of Contents --- p.iv / List of Figures --- p.vi / List of Tables --- p.viii / Chapter Chapter 1 --- Introduction / Chapter 1.1 --- Magnetoresistance --- p.1 / Chapter 1.1.1 --- Giant magnetoresistance (GMR) --- p.3 / Chapter 1.1.2 --- Colossal magnetoresistance (CMR) in perovskite manganites --- p.5 / Chapter 1.1.2.1 --- Perovskite-type structure --- p.5 / Chapter 1.1.2.2 --- Metal-insulator transition --- p.7 / Chapter 1.1.2.3 --- Possible origin of CMR --- p.11 / Chapter 1.2 --- Low field magnetoresistance in CMR materials --- p.12 / Chapter 1.2.1 --- Single crystal and polycrystalline perovskite manganites --- p.12 / Chapter 1.2.2 --- Manganite trilayer junctions --- p.13 / Chapter 1.2.3 --- Possible mechanism of low field MR --- p.15 / Chapter 1.3 --- Our motivation --- p.15 / Chapter 1.3.1 --- Brief review of several manganite multilayer systems --- p.16 / Chapter 1.3.2 --- Scope of this thesis work --- p.18 / Reference --- p.19 / Chapter Chapter 2 --- Preparation and characterization of manganite thin films / Chapter 2.1 --- Thin film deposition --- p.22 / Chapter 2.1.1 --- Facing-target sputtering (FTS) --- p.22 / Chapter 2.1.2 --- Vacuum system --- p.25 / Chapter 2.2 --- Fabrication and characterization of PCMO and LCMO targets --- p.27 / Chapter 2.3 --- Epitaxial growth of LCMO thin films --- p.31 / Chapter 2.3.1 --- Substrate materials --- p.31 / Chapter 2.3.2 --- Deposition conditions --- p.32 / Chapter 2.3.3 --- Deposition procedure --- p.33 / Chapter 2.3.4 --- Results and discussions --- p.34 / Chapter 2.3.4.1 --- Morphology --- p.35 / Chapter 2.3.4.2 --- Structure --- p.39 / Chapter 2.3.4.3 --- Transport properties --- p.42 / Chapter 2.3.4.4 --- Conclusion --- p.48 / Chapter 2.4 --- Epitaxial growth of PCMO thin films --- p.49 / References --- p.51 / Chapter Chapter 3 --- LCMO/PCMO multilayer / Chapter 3.1 --- Sample preparation --- p.53 / Chapter 3.2 --- Results and discussion --- p.53 / Chapter 3.2.1 --- Structure characterization --- p.55 / Chapter 3.2.2 --- Transport properties --- p.59 / Chapter 3.2.3 --- Low-field magnetoresistance --- p.55 / Chapter 3.2.4 --- Magnetization --- p.73 / Chapter 3.3 --- Conclusion --- p.76 / References --- p.77 / Chapter Chapter 4 --- Conclusions --- p.78
30

Investigation of the transport properties of La₂/₃Ca₁/₃MnO₃/Y₂O₃ and La₂/₃Ca₁/₃MnO₃/Gd₂O₃ multilayer thin films and trilayer sandwiches. / La₂/₃Ca₁/₃MnO₃/Y₂O₃和La₂/₃Ca₁/₃MnO₃/Gd₂O多層薄膜及其三文治結構的傳導特性之研究 / Investigation of the transport properties of La₂/₃Ca₁/₃MnO₃/Y₂O₃ and La₂/₃Ca₁/₃MnO₃/Gd₂O₃ multilayer thin films and trilayer sandwiches. / La₂/₃Ca₁/₃MnO₃/Y₂O₃ he La₂/₃Ca₁/₃MnO₃/Gd₂O duo ceng bo mo ji qi san wen zhi jie gou de chuan dao te xing zhi yan jiu

January 2009 (has links)
Kong, Yu Chau = La₂/₃Ca₁/₃MnO₃/Y₂O₃和La₂/₃Ca₁/₃MnO₃/Gd₂O多層薄膜及其三文治結構的傳導特性之研究 / 江如秋. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2009. / Includes bibliographical references. / Abstract also in Chinese. / Kong, Yu Chau = La₂/₃Ca₁/₃MnO₃/Y₂O₃ he La₂/₃Ca₁/₃MnO₃/Gd₂O duo ceng bo mo ji qi san wen zhi jie gou de chuan dao te xing zhi yan jiu / Jiang Ruqiu. / Abstract --- p.i / 論文摘要 --- p.ii / Acknowledgements --- p.iii / Table of Contents --- p.iv / List of Figures --- p.vii / List of Tables --- p.x / Chapter Chapter 1 --- Introduction / Chapter 1.1 --- Introduction to Magnetoresistance --- p.1 / Chapter 1.1.1 --- Anisotropic magnetoresistance (AMR) --- p.3 / Chapter 1.1.2 --- Giant magnetoresistance (GMR) --- p.3 / Chapter 1.1.3 --- Colossal magnetoresistance (CMR) --- p.5 / Chapter 1.1.4 --- Tunneling magnetoresistance (TMR) --- p.7 / Chapter 1.2 --- Possible origins of CMR in doped manganite --- p.8 / Chapter 1.2.1 --- Double exchange mechanism --- p.10 / Chapter 1.2.2 --- Jahn-Teller (JT) distortion --- p.14 / Chapter 1.2.3 --- Tolerance factor --- p.16 / Chapter 1.2.4 --- Charge Ordering and percolation theory --- p.18 / Chapter 1.3 --- Motivation --- p.21 / Chapter 1.4 --- Literature Review --- p.23 / Chapter 1.4.1 --- Multilayers --- p.23 / Chapter 1.4.2 --- Junction --- p.25 / Chapter 1.5 --- Scope of this thesis --- p.26 / References --- p.27 / Chapter Chapter 2 --- Instrumentation / Chapter 2.1 --- Thin film deposition --- p.30 / Chapter 2.1.1 --- Facing target sputtering (FTS) --- p.31 / Chapter 2.1.2 --- Vacuum system --- p.33 / Chapter 2.2 --- Oxygen annealing --- p.35 / Chapter 2.3 --- Characterization --- p.35 / Chapter 2.3.1 --- Alpha step profilometer --- p.35 / Chapter 2.3.2 --- X-ray diffraction (XRD) --- p.36 / Chapter 2.3.3 --- Transport measurement --- p.39 / Reference --- p.41 / Chapter Chapter 3 --- Epitaxial growth of La2/3Ca1/3MnO3 and rare earth oxide single layer thin films / Chapter 3.1 --- Introduction --- p.42 / Chapter 3.2 --- Preparation of sputtering targets of rare earth metal and La2/3Ca1/3MnO3 --- p.42 / Chapter 3.3 --- Epitaxial growth of LCMO and Re2O3 thin film --- p.44 / Chapter 3.3.1 --- Substrate materials --- p.44 / Chapter 3.3.2 --- Deposition conditions --- p.45 / Chapter 3.3.3 --- Deposition procedures --- p.48 / Chapter 3.4 --- Characterization of single layer thin films --- p.49 / Chapter 3.5 --- Discussion --- p.52 / References --- p.53 / Chapter Chapter 4 --- LCMO/Y2O3 and LCM0/Gd203 multilayers / Chapter 4.1 --- Sample preparation --- p.54 / Chapter 4.2 --- As-deposited multilayers --- p.56 / Chapter 4.2.1 --- Structural Characterization --- p.56 / Chapter 4.2.2 --- Transport properties --- p.62 / Chapter 4.3 --- Oxygen annealing --- p.67 / Chapter 4.3.1 --- Introduction --- p.67 / Chapter 4.3.2 --- Post-annealing condition --- p.68 / Chapter 4.4 --- Oxygen post-annealed multilayers --- p.69 / Chapter 4.4.1 --- Structural Characterization --- p.69 / Chapter 4.4.2 --- Transport properties --- p.76 / Chapter 4.5 --- Discussion --- p.85 / References --- p.86 / Chapter Chapter 5 --- LCMO/Y2O3/LCMO trilayer sandwiches / Chapter 5.1 --- Introduction --- p.88 / Chapter 5.2 --- Sample preparation --- p.89 / Chapter 5.3 --- Current-Voltage (I-V) measurement --- p.90 / References --- p.92 / Chapter Chapter 6 --- Conclusion / Chapter 6.1 --- Summary --- p.93 / Chapter 6.2 --- Further work --- p.94

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