CHEMICAL VAPOR DEPOSITION OF THIN FILM MATERIALS FOR ...

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NFO Nickel ferrite (NiFe2O4) ω Angular frequency or angle in transverse X-ray diffraction measurement P Polarization PECVD/ALD Plasma enhanced chemical vapor depostion/atomic layer deposition PLD Pulsed laser deposition ψ Longitudinal tilting angle in X-ray diffraction measurement RF Radio frequency RMS Root mean square σ Photoelectric cross section θ Angle s, p, d, f electron subshells SEM Scanning electron microscopy T Temperature Tc Curie temperature TDMAH Tetrakis (dimethylamido) hafnium TEM Transmission electron microscopy TMR Tunneling magnetoresistance VSM Vibrating sample magnetometer UV Ultraviolet light XPS X-ray photoelectron spectroscopy XRD X-ray diffraction XRR X-ray reflectivity x, y, z Cartesian coordination vii
ACKNOWLEDGMENTS It is my pleasure to have this opportunity to express my sincere appreciation to everyone who gave me help to my research and life during my Ph. D. period. The most important person is my advisor Dr. Tonya M. Klein, who guided me into the field of chemical vapor deposition of solid thin film materials. From the basic knowledge of vacuum system design and maintenance to theoretical understanding of thin film growth behavior, I have been greatly benefited from her professional guidance and advising. I would like to express deep respects and great thanks for her patient teaching, invaluable support, and kind trust and encouragement in the past 5 years. I would like to thank my co-advisor Dr. Arunava Gupta, who directed me into the world of magnetic/microwave thin film growth and characterization, which greatly improved my understanding of the relationship between thin film processing conditions and thin film physical properties. Under his support, I have the opportunity to access various cutting-edge thin film characterization techniques/equipments. From him, I have learned a lot on the correct research attitude and the efficient way of analyzing and solving problems. I would like to thank my committee members: Dr. Alan Lane, Dr. Subhadra Gupta and Dr. Mark Weaver, who have greatly helped me on certain sample characterization, experimental equipments and results interpretation. By taking their courses and discussing with them, I have got a lot of inspirations and learnt how to keep a correct track on my research. Their professional experience in both materials science and chemical engineering always help me to figure out the best solutions in my research. viii
Page 1 and 2: CHEMICAL VAPOR DEPOSITION OF THIN F
Page 3 and 4: ABSTRACT Chemical vapor deposition
Page 5 and 6: DEDICATION This dissertation is ded
Page 7: φ In-plane tilt angle of X-ray dif
Page 11 and 12: CONTENTS ABSTRACT .................
Page 13 and 14: 3.2.1 Introduction ................
Page 15 and 16: LIST OF TABLES Table 1. Hafnium ami
Page 17 and 18: indicated by the complex FMR curve.
Page 19 and 20: Fig. 49. Ferromagnetic resonance cu
Page 21 and 22: growth rate, good step coverage and
Page 23 and 24: growth of thin film oxides due to t
Page 25 and 26: one can uniformly deliver precursor
Page 27 and 28: for the next reaction step as shown
Page 29 and 30: Fig. 3. Schematic of a typical dire
Page 31 and 32: is predominantly dependent on syste
Page 33 and 34: J r J A -D n b-n 0 δ n or for the
Page 35 and 36: surface passivation with certain in
Page 37 and 38: ay spectroscopy (EDS), Wavelength d
Page 39 and 40: incidence angle is larger than cert
Page 41 and 42: epresenting those characteristic ph
Page 43 and 44: 1.2.3.3 X-ray Diffraction (XRD) X-r
Page 45 and 46: exhibit diffraction peaks in the no
Page 47 and 48: (nanometers to tens of nanometers),
Page 49 and 50: strongest absorption of microwave s
Page 51 and 52: pinch-off to indicate the lack of a
Page 53 and 54: coupling is from unbound ferrite-fe
Page 55 and 56: diffusion barrier material in micro
Page 57 and 58: Fig. 14. A cross sectional scanning
Page 59 and 60:
In spite of the same spinel structu
Page 61 and 62:
ferrites has been investigated exte
Page 63 and 64:
systems is showed in Fig.18.[83] As
Page 65 and 66:
precursor vaporization process, e.g
Page 67 and 68:
CHAPTER 3. PLASMA ENHANCED ATOMIC L
Page 69 and 70:
the initial surface chemistry for t
Page 71 and 72:
delay time of 2 seconds between spe
Page 73 and 74:
Kcal/mol respectively. The stronger
Page 75 and 76:
negative slope) behavior in the pum
Page 77 and 78:
the existence of both physisorbed a
Page 79 and 80:
decomposition products (Hf-H) and g
Page 81 and 82:
dried by ultra high purity N2 gas.
Page 83 and 84:
pressure for XPS analysis is around
Page 85 and 86:
Hf and N elements, incorporation of
Page 87 and 88:
[150,151] This is a unique feature
Page 89 and 90:
software. The thickness results are
Page 91 and 92:
CHAPTER 4. DIRECT LIQUID INJECTION
Page 93 and 94:
film growth region. The properties
Page 95 and 96:
solution was accurately controlled
Page 97 and 98:
size). For the rocking curve analys
Page 99 and 100:
oxygen does not participate in the
Page 101 and 102:
ecause vapor velocity cannot be cha
Page 103 and 104:
Fig. 40. Cross-sectional view by fi
Page 105 and 106:
the MgAl2O4 substrate confirms cube
Page 107 and 108:
pattern. Fig.44(b) has diffraction
Page 109 and 110:
We have used an AGM (Alternating Gr
Page 111 and 112:
as derived equations for different
Page 113 and 114:
deposited at 600˚C is the lowest.
Page 115 and 116:
wave states degenerate with the FMR
Page 117 and 118:
Fig. 53. ϕ-scan of nickel ferrite
Page 119 and 120:
Surface roughness characterized by
Page 121 and 122:
Fig. 56. X-ray diffraction θ-2θ c
Page 123 and 124:
4.4 Conclusion In summary, we have
Page 125 and 126:
CHAPTER 5. DIRECT LIQUID INJECTION
Page 127 and 128:
eaction zone of the tube furnace is
Page 129 and 130:
Fig. 58. X-ray diffraction characte
Page 131 and 132:
interface. This phenomenon probably
Page 133 and 134:
6.1 Conclusion CHAPTER 6. CONCLUSIO
Page 135 and 136:
the temperature range of 600˚C to
Page 137 and 138:
such as PMN-PT and PZN-PT. CVD proc
Page 139 and 140:
[18]. L. S.-J. Peng, X. X. Xi, B. H
Page 141 and 142:
[54]. B. O. Johansson, J. -E. Sundg
Page 143 and 144:
[96]. J. D. Adam, S. V. Krishnaswam
Page 145 and 146:
[136]. J. Zhao, V. Fuflyigin, F. Wa
Page 147 and 148:
APPENDIX A: LabVIEW PROGRAM FOR PEA
Page 149 and 150:
APPENDIX B: TDMAH MOLECULAR STRUCTU
Page 151 and 152:
H 18 B19 2 A18 1 D17 H 18 B20 2 A19
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