by Xianting Zeng. / Publication date from spine. / Thesis (Ph.D.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references (leaves 165-173). / ABSTRACT --- p.iii / ACKNOWLEDGEMENT --- p.v / TABLE OF CONTENTS --- p.vii / LIST OF FIGURES --- p.x / LIST OF TABLES --- p.xiv / Chapter I. --- Introduction --- p.1 / Chapter 1.1 --- Previous research on magnetoresistance --- p.1 / Chapter 1.2 --- Preparation methods --- p.12 / Chapter 1.3 --- Application prospects and existing problems of GMR materials --- p.15 / Chapter 1.4 --- Main contents in this thesis --- p.17 / Chapter II. --- The facing-target sputtering technique --- p.20 / Chapter 2.1 --- Brief description of FTS method --- p.20 / Chapter 2.2 --- Considerations and studies about the deposition conditions of La-Ca-Mn-O thin films --- p.26 / Chapter 2.2.1 --- Substrate materials --- p.26 / Chapter 2.2.1.1 --- Mismatch of lattice constant --- p.26 / Chapter 2.2.1.2 --- Thermal expansion coefficient --- p.31 / Chapter 2.2.1.3 --- Cleaning and surface treatment --- p.33 / Chapter 2.2.2 --- Substrate temperature --- p.35 / Chapter 2.2.3 --- Discharge pressure and sputtering power --- p.36 / Chapter 2.2.4 --- Oxygen content and critical thickness --- p.36 / Chapter 2.3 --- Fabrication and characteristics of La-Ca-Mn-O target materials --- p.42 / Chapter 3.2.1 --- Fabrication process --- p.42 / Chapter 2.3.2 --- Characterizations --- p.46 / Chapter 2.3.2.1 --- Structural parameters --- p.46 / Chapter 2.3.2.2 --- Electrical and magnetic properties --- p.51 / Chapter III. --- Growth of La-Ca-Mn-O thin films with c-axis orientation --- p.53 / Chapter 3.1 --- Thin film deposition --- p.53 / Chapter 3.2 --- Characterization methods --- p.53 / Chapter 3.2.1 --- XRD --- p.54 / Chapter 3.2.2 --- SEM/EDX --- p.54 / Chapter 3.2.3 --- VSM --- p.57 / Chapter 3.3 --- Results and discussions --- p.58 / Chapter 3.3.1 --- Structures of the films grown on (100) MgO --- p.58 / Chapter 3.3.2 --- Resistance and magnetoresistance --- p.62 / Chapter 3.3.3 --- Annealing effect --- p.69 / Chapter 3.4.3.4 --- Magnetization --- p.71 / Chapter 3.4 --- Conclusion --- p.75 / Chapter IV. --- Epitaxial growth of single crystal LCMO thin films with a-axis orientation --- p.77 / Chapter 4.1 --- Motivation and thin film deposition --- p.77 / Chapter 4.2 --- Characterizations --- p.79 / Chapter 4.2.1 --- DCD/GID --- p.79 / Chapter 4.2.2 --- Laue diffractometry --- p.84 / Chapter 4.3 --- Results and discussions --- p.85 / Chapter 4.4 --- Conclusion --- p.91 / Chapter V. --- Crystal growth mechanisms in the deposition of LCMO thin films --- p.93 / Chapter 5.1 --- Introduction --- p.93 / Chapter 5.2 --- AFM/STM --- p.96 / Chapter 5.3 --- Step-flow growth --- p.100 / Chapter 5.4 --- Roughening growth --- p.107 / Chapter 5.5 --- 3-D growth --- p.111 / Chapter 5.6 --- Conclusion --- p.119 / Chapter VI. --- Anisotropy properties of epitaxial LCMO thin films and colossal low field magnetoresistance --- p.122 / Chapter 6.1 --- Introduction --- p.122 / Chapter 6.2 --- Experiments --- p.124 / Chapter 6.3 --- Results and discussions --- p.125 / Chapter 6.3.1 --- Morphology --- p.125 / Chapter 6.3.2 --- Transport properties --- p.125 / Chapter 6.4 --- Conclusion --- p.134 / Chapter VII. --- Optical response of epitaxial LCMO thin films --- p.135 / Chapter 7.1 --- Introduction --- p.135 / Chapter 7.2 --- Experimental procedures --- p.138 / Chapter 7.2.1 --- Sample preparation --- p.138 / Chapter 7.2.2 --- Measurements of the optical spectra --- p.140 / Chapter 7.2.3 --- Measurements of the optical response --- p.140 / Chapter 7.3 --- Experimental results and discussions --- p.142 / Chapter 7.3.1 --- Optical spectra --- p.142 / Chapter 7.3.2 --- Optical response characteristics --- p.145 / Chapter 7.3.3 --- 1/f noise in LCMO materials --- p.148 / Chapter 7.4 --- Potential applications --- p.154 / Chapter 7.5 --- Conclusion --- p.156 / Chapter VIII. --- Conclusion and further studies --- p.158 / Chapter 8.1 --- Conclusion --- p.158 / Chapter 8.2 --- Further studies --- p.161 / References --- p.165
| Identifer | oai:union.ndltd.org:cuhk.edu.hk/oai:cuhk-dr:cuhk_321586 |
| Date | January 1996 |
| Contributors | Zeng, Xianting., Chinese University of Hong Kong Graduate School. Division of Physics. |
| Publisher | Chinese University of Hong Kong |
| Source Sets | The Chinese University of Hong Kong |
| Language | English |
| Detected Language | English |
| Type | Text, bibliography |
| Format | print, xiv, 173 leaves : ill. ; 30 cm. |
| Rights | Use of this resource is governed by the terms and conditions of the Creative Commons “Attribution-NonCommercial-NoDerivatives 4.0 International” License (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
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