Thesis (proefschrift)--Rijksuniversiteit te Utrecht, 1933. / "Stellingen" (2 leaves) inserted. Includes bibliographical references.

Thesis (Ph. D.)--Columbia University, 1935. / Vita. Bibliography: p. [35].

by Cheng Kai. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1997. / Includes bibliographical references. / by Cheng Kai. / Acknowledgments --- p.i / Abstract --- p.ii / Table of content --- p.iv / Chapter Chapter One --- Introduction / Chapter 1.1 --- Barkhausen emission --- p.1 / Chapter 1.2 --- Methods of measurements --- p.3 / Chapter 1.2.1 --- Magnetization of a sample --- p.4 / Chapter 1.2.2 --- Signal detection --- p.5 / Chapter 1.2.3 --- Signal processing --- p.5 / Chapter 1.3 --- Instrumentation --- p.6 / Chapter 1.3.1 --- Instron loading machine --- p.6 / Chapter 1.3.2 --- Optical microscopy --- p.7 / Chapter 1.3.3 --- Vicker's hardness tester --- p.7 / Chapter 1.3.4 --- Ceramic furnace --- p.8 / References --- p.9 / Chapter Chapter Two --- Domain Theory / Chapter 2.1 --- The postulate of domain --- p.16 / Chapter 2.2 --- Domain energy --- p.18 / Chapter 2.3 --- The magnetization process --- p.20 / Chapter 2.4 --- Effect of applied stress --- p.22 / Chapter 2.5 --- Hindrances to wall motion by inclusions --- p.23 / References --- p.24 / Chapter Chapter Three --- Steels / Chapter 3.1 --- The making of steel --- p.28 / Chapter 3.2 --- The iron-iron carbide phase diagram --- p.29 / Chapter 3.3 --- Heat treatment of plain-carbon steels --- p.29 / Chapter 3.3.1 --- Slow cooling of plain-carbon steels --- p.29 / Chapter 3.3.2 --- Rapid cooling of plain-carbon steels --- p.30 / Chapter 3.3.3 --- Annealing --- p.31 / References --- p.32 / Chapter Chapter Four --- Effects of carbon on Barkhausen emission in plain carbon steel / Chapter 4.1 --- introduction --- p.35 / Chapter 4.2 --- Experiments --- p.36 / Chapter 4.2.1 --- Samples --- p.36 / Chapter 4.3 --- Results and discussions --- p.37 / Chapter 4.4 --- Conclusions --- p.39 / References --- p.40 / Chapter Chapter Five --- Magnetization process in a steel plate/bar subjected to an increasing tensile load / Chapter 5.1 --- Introduction --- p.45 / Chapter 5.2 --- Experiments --- p.47 / Chapter 5.3 --- Results and discussions for the zinc-coated steel plate --- p.47 / Chapter 5.4 --- Results and discussions for mild steel --- p.50 / Chapter 5.5 --- A comparison between steel plate and steel bar --- p.52 / Chapter 5.6 --- Conclusions --- p.53 / References --- p.54 / Chapter Chapter Six --- Evaluation of residual stress in bent steel bars subjected to different heat treatment by Barkhausen emission / Chapter 6.1 --- Introduction --- p.60 / Chapter 6.2 --- Experiments --- p.60 / Chapter 6.3 --- Results and discussions --- p.61 / Chapter 6.4 --- Conclusions --- p.64 / References --- p.65 / Chapter Chapter Seven --- Effects of heat treatment on electrolytic zinc-coated steel plates by Barkhausen emission / Chapter 7.1 --- Introduction --- p.72 / Chapter 7.2 --- Experiments --- p.72 / Chapter 7.3 --- Results and discussions --- p.73 / Chapter 7.4 --- Conclusions --- p.75 / References --- p.76 / Chapter Chapter Eight --- Effects of demagnetizing and stray fields on Barkhausen emission / Chapter 8.1 --- Introduction --- p.80 / Chapter 8.2 --- Experiments --- p.80 / Chapter 8.3 --- Results and discussions --- p.81 / Chapter 8.4 --- Conclusions --- p.85 / References --- p.85 / Chapter Chapter Nine --- Conclusions and suggestions for further studies --- p.90

Thesis (Ph. D.)--Columbia University, 1931. / Vita. Bibliography: p. [40].

Thesis (Ph. D.)--Columbia University, 1934. / Vita. Bibliography: p. [60-61].

Thesis (Ph. D.)--University of Michigan, 1924. / Reprinted from two articles by Alfred L. Ferguson and Gerrit Van Zyl, published in the Transactions of the Electrochemical Society, v. 45, 1924 and v. 47, 1925.

In this thesis we investigate different phases of matter in systems driven out of equilibrium. In particular, we focus on current driven metal insulator transitions and on the physics of negative conductivity in photoexcited metals. We present a new mechanism by which a modest applied electric field can destabilize a correlated insulating phase at finite temperature, without directly exciting carriers across the gap. We investigate the consequences of a metal insulator phase interface, and show that the large difference in Seebeck coefficients leads to a substantial heat generation or removal at the interface depending on the direction of the applied electric current; our findings explain the key features of recent interesting experiments in Calcium Ruthenate. We also analyze a model of a metal coupled to a strongly photoexcited phonon mode and show that under general conditions the system exhibits a negative conductivity, even long after the removal of the pump; we study the phenomenological consequences of such state and find that it leads to a novel and purely non-equilibrium collective mode coupling charge and entropy. The resonance of this mode with probe radiation induces an enhancement of the optical reflectivity and can explain the experimental reports of the non-equilibrium state in photoexcited fullerides.

by Ng, Hiu Tung. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1997. / Includes bibliographical references (leaves 121-123). / by Ng, Hiu Tung. / Acknowledgement --- p.i / Abstract --- p.ii / Table of Contents --- p.iv / List of Figures --- p.viii / List of Tables --- p.xi / Chapter Chapter One --- Introduction --- p.1 / Chapter 1.1 --- Non-destructive testing techniques --- p.2 / Chapter 1.1.1 --- Liquid penetration technique --- p.2 / Chapter 1.1.2 --- Electrical methods (Eddy current testing) --- p.3 / Chapter 1.1.3 --- Ultrasonic testing --- p.4 / Chapter 1.1.4 --- Radiography --- p.5 / Chapter 1.1.5 --- Magnetic methods --- p.6 / Chapter 1.2 --- The development of Barkhausen and magnetoacoustic emissions --- p.7 / Chapter 1.2.1 --- Barkhausen emission --- p.7 / Chapter 1.2.2 --- Magnetoacoustic emission --- p.8 / Chapter 1.3 --- The advantages of using Barkhausen and magnetoacoustic emission over the other nondestructive techniques --- p.10 / Chapter Chapter Two --- Fundamental concept in ferromagnetic materials --- p.12 / Chapter 2.1 --- Ferromagnetism --- p.12 / Chapter 2.1.1 --- Curie point --- p.13 / Chapter 2.1.2 --- Hysteresis loop --- p.14 / Chapter 2.2 --- Magnetic domains --- p.17 / Chapter 2.2.1 --- Magneto static energy --- p.17 / Chapter 2.2.2 --- Structure of domain wall --- p.19 / Chapter 2.2.3 --- Domain wall motion --- p.21 / Chapter 2.2.4 --- Domain nucleation --- p.22 / Chapter 2.3 --- Magnetostriction --- p.28 / Chapter 2.3.1 --- Spontaneous magnetostriction --- p.28 / Chapter 2.3.2 --- Saturation magnetostriction --- p.29 / Chapter 2.3.3 --- Field-induced magnetostriction --- p.29 / Chapter 2.3.4 --- Magnetostriction of polycrystalline --- p.30 / Chapter 2.4 --- Effect of stress on magnetic properties --- p.36 / Chapter 2.4.1 --- Stress --- p.36 / Chapter 2.4.2 --- Effect of stress on the magnetization --- p.37 / Chapter 2.4.3 --- Effect of stress on the magnetostriction --- p.38 / Chapter 2.5 --- Eddy current shielding --- p.41 / Chapter Chapter Three --- Barkhausen emission and magnetoacoustic emission --- p.42 / Chapter 3.1 --- Barkhausen emission --- p.42 / Chapter 3.1.1 --- The wall potential energy model of Barkhausen emission --- p.43 / Chapter 3.1.2 --- Typical BE profiles --- p.45 / Chapter 3.2 --- Magnetoacoustic emission --- p.48 / Chapter 3.2.1 --- Magnetoacoustic emission model --- p.48 / Chapter 3.2.2 --- Typical MAE profiles --- p.50 / Chapter Chapter Four --- Instrumentation --- p.52 / Chapter 4.1 --- Introduction --- p.52 / Chapter 4.2 --- Experimental setup for Barkhausen emission --- p.53 / Chapter 4.3 --- Experimental setup for magnetoacoustic emission --- p.56 / Chapter 4.4 --- Specimen treatment --- p.58 / Chapter 4.4.1 --- Furnace --- p.58 / Chapter 4.4.2 --- Instron loading machine --- p.60 / Chapter 4.4.3 --- Optical microscopy --- p.60 / Chapter 4.4.4 --- Vicker's hardness tester --- p.61 / Chapter Chapter Five --- Effect of field frequency and strength on Barkhausen emission in mild steel and nickel --- p.66 / Chapter 5.1 --- Introduction --- p.66 / Chapter 5.2 --- Experiments --- p.67 / Chapter 5.3 --- Results and discussions --- p.68 / Chapter 5.4 --- Conclusions --- p.76 / Chapter Chapter Six --- Effect of residual stress on Barkhausen and magnetoacoustic emissions in steel bar --- p.77 / Chapter 6.1 --- Introduction --- p.77 / Chapter 6.2 --- Experiments --- p.81 / Chapter 6.3 --- Results and discussions --- p.84 / Chapter 6.3.1 --- BE profiles --- p.84 / Chapter 6.3.2 --- MAE profiles --- p.85 / Chapter 6.3.3 --- Optical microscopy and hardness measurements --- p.85 / Chapter 6.4 --- Conclusions --- p.92 / Chapter Chapter Seven --- Effect of residual stress on Barkhausen and magnetoacoustic emissions in a nickel bar --- p.93 / Chapter 7.1 --- Introduction --- p.93 / Chapter 7.2 --- Experiments --- p.96 / Chapter 7.3 --- Results and discussions --- p.97 / Chapter 7.3.1 --- Hardness and optical microscopy measurement --- p.97 / Chapter 7.3.2 --- BE profiles --- p.98 / Chapter 7.3.3 --- MAE profiles --- p.99 / Chapter 7.4 --- Comparison of nickel and mild steel --- p.106 / Chapter 7.5 --- Conclusions --- p.108 / Chapter Chapter Eight --- Effect of dynamic stress on Barkhausen emission in mild steel --- p.109 / Chapter 8.1 --- Introduction --- p.109 / Chapter 8.2 --- Experiments --- p.110 / Chapter 8.3 --- Results and discussions --- p.112 / Chapter 8.4 --- Conclusions --- p.118 / Chapter Chapter Nine --- Conclusions --- p.119 / References --- p.121

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