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Thursday, April 16, 2020 | History

2 edition of Effect of dislocations on the electrical and galvanomagnetic properties of Germanium. found in the catalog.

Effect of dislocations on the electrical and galvanomagnetic properties of Germanium.

Jacobus Herman Pieter van Weeren

Effect of dislocations on the electrical and galvanomagnetic properties of Germanium.

  • 138 Want to read
  • 24 Currently reading

Published by V. R. B. (Kleine der A 3-4) in Groningen .
Written in English

    Subjects:
  • Germanium crystals -- Electric properties.,
  • Germanium crystals -- Magnetic properties.,
  • Dislocations in crystals.

  • Classifications
    LC ClassificationsQC176.8.M3 W4
    The Physical Object
    Paginationviii, 72 p.
    Number of Pages72
    ID Numbers
    Open LibraryOL5156454M
    LC Control Number74405845

    ing treatments resulted in films featuring field-effect electron mobilities approaching cm2 V 1 s 1 which are,to the best of ourknowledge, thehighest ever reported values for ICBAwithin the scientific literature. Transistors in bottom-contact bottom-gate geometry were fabricated on Si-n++, acting as a substrate and a gate electrode. fractional or partial dislocations. The results show excellent agreement with experiments for twinning [10] and slip [11] in a number of intermetallic alloys. In this paper, we present the modeling efforts for slip and twinning for Ni3 (Al, Ti, Ta, Hf) compositions with L12 crystal structures. The lattice parameters are studied as well as the. Full text of "Electrical properties of materials and their measurement at low temperatures" See other formats.   "A dislocation theory of fatigue failure for annealed solid solutions is presented. On the basis of this theory, an equation giving the dependence of the number of cycles for failure on the stress, the temperature, the material parameters, and the frequency is derived for uniformly stressed specimens. The equation is in quantitative agreement with the data" (p. ).Cited by: 6.


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Effect of dislocations on the electrical and galvanomagnetic properties of Germanium. by Jacobus Herman Pieter van Weeren Download PDF EPUB FB2

SURFACE SCIENCE 19() North-Holland Publishing Co., Amsterdam THE EFFECT OF EDGE DISLOCATIONS ON THE ELECTRICAL PROPERTIES OF THE REAL GERMANIUM SURFACE JACEK LAGOWSKI, ANDRZEJ MORAWSKI and JERZY SOCHANSKI Institute of Physics, Polish Academy of Sciences, Zie Warsaw, Poland Received 24 January Cited by: 2.

Dislocation movement is induced during plastic deformation and influences the mechanical properties. Although the role of dislocation in mechanical properties has been well understood, the role of dislocation in electrical properties is completely lacking. Only Matthiessen's rule addresses the electrical influence of dislocations at the by: 9.

If the dislocations are present in the material in a parallel array, the anisotropy of the conductivity can be observed since the voids will have a different effect with the current parallel to them THE ELECTRICAL PROPERTIES OF DISLOCATIONS IN SILICON-II than they do with the current perpendicular to by: THEORY OF GALVANOMAGNETIC EFFECTS IN METALS I 7.

Author(s) Gale Fair 9. between electronic states and the second including the effect of the Lorentz force. The eigenfunctions of these operators provide a natural framework for a quantitative descrip- tion of the galvanomagnetic properties of a metal, for both an assumed Fermi surface.

The effect is as if a knife had sliced through the crystal and then the pieces were stuck back together, askew from their original positions. These defects have a strong effect on phonons, the modes of lattice vibration that play a role in the thermal and electrical properties of the crystals through which they travel.

Effect of edge dislocations on structural and electric properties of 4H-SiC the electrical activity of dislocations in silicon carbide Schottky. Galvanomagnetic Phenomena the aggregate of phenomena associated with the action of a magnetic field on the electrical (galvanic) properties of solid conductors (metals and semiconductors) through which a current is flowing.

The most important are the phenomena in a magnetic field H that is perpendicular to the current (transverse galvanomagnetic. Effect of dislocations on electrical and electron transport properties of InN thin films.

Density and mobility of the carriers. The thermal conductivity vs temperature relation in deformed germanium single crystals is measured in the temperature range from to 30 K.

The results are analysed on the basis of the Callaway model. Klemens’ theory on the scattering of phonons due to the static strain field of dislocations accounts for the experimental results reasonably Cited by:   Results of photoelectric and galvanomagnetic measurements on p-type Ge with dislocations are presented.

The lifetime of the minority carriers was found to be anisotropic. The experimental results are discussed in the light of other results referring to the lifetime, and some ideas on a possible dislocation energy level structure are : I. Cseh, B. Pődör. ELECTRICAL RESISTIVITY AND HALL EFFECT IN GERMANIUM REFERENCES A.

Melissinos, Experiments in Modern Physics, p. Kittel, Introduction to Solid State Physics F. Reif, Fundamentals of Statistical and Thermal Physics INTRODUCTION In this experiment the resistivity and Hall effect in a crystal of n-typeFile Size: 71KB. Optical Properties and Band Structure of Semiconductors, Volume 1 presents the experimental studies of the fundamental energy band structure of semiconductors and insulators.

This book provides detailed information of the available measurement methods and results for a large number of both cubic and non-cubic materials.

Results of electrical properties of the worked alloy are presented in figure 4, 5, and 6. Thermal Conductivity Test: Thermal conductivity test was performed on the specimens (or samples) using the Lee’s Disc method, the details of which can be found in literature [8], Lee’s Disc Apparatus (Figure 3) is made of polish wood and it consists of disc A, B, C, heater disc, and a space for.

the two fields, i. the effect of dislocation processes on the magnetization processes. This field has been studied quite intensively in recent years at Stuttgart, and the present paper intends to outline some of this research.

The quantitative studies of the effect of dislocations. Czochralski GaAs grown with In incorporated into the melt has large regions with fewer than cm-2 dislocations. We have examined the effect of these dislocations on substrate and device properties.

Infrared transmission images reveal dark filaments of high EL2 concentration a few tens of microns in diameter surrounding dislocations, Cathodo and Cited by: 7. Characterization of dislocations in germanium substrates induced by mechanical stress S.

Gan, L. Li, and R. Hicksa) Chemical Engineering Department, University of California, Los Angeles, Boelter Hall, Los Angeles, California ~Received 24 March ; accepted for publication 26 June.

Dislocations are observed in germanium Cited by: 5. Study of dislocations from continuous flattening anneal and its effect on magnetic properties of grain oriented electrical steel Sreevathsan Ramanathan Dislocations and their effects on magnetic properties 19 References 22 Chapter 3 Literature review – Production and evolution of GOES Dislocations interact with the microstructure of the material and these interactions are responsible for their yield, work-hardening, ductility, and other plastic properties.

Dislocation motion in a crystal is analogous to moving a rug over a floor by introducing a ruck on one edge. Pushing the ruck to the other edge moves the carpet by the. Dislocations allow deformation at much lower stress than in a perfect crystal MSE Introduction to Materials Science Chapter 7, Strengthening 4 Direction of the dislocation motion For mixed dislocations, direction of motion is in between parallel and perpendicular to the applied shear stress Edge dislocation line moves parallel to applied File Size: KB.

Galvanomagnetic and Thermomagnetic Effects: And Hall Effects the Hall and Allied Phenomena (Classic Reprint) [L. Campbell] on *FREE* shipping on qualifying offers. The purpose of this monograph is to bring together the historical, experimental and theoretical accounts of that family of galvanomagnetic and thermomagnetic phenomena that are the lineal Author: L.

Campbell. This page contains materials for the session on line, interface, and bulk defects in crystals. It features a 1-hour lecture video, and also presents the prerequisites, learning objectives, reading assignment, lecture slides, homework with solutions, and resources for further study.

This review describes the characteristics of dislocations in dislocation arrays and grain boundaries as they appear in imperfect and polycrystalline semiconductors. To further the understanding of the electronic features of these structures, metallurgical and crystallographic aspects of grain boundaries are reviewed.

Grain‐boundary diffusion is discussed as part of the metallurgy of Cited by:   Purchase Fundamental Aspects of Dislocation Interactions - 1st Edition.

Print Book & E-Book. ISBNBook Edition: 1. Dislocations introduced into single crystals of germanium grown by the Czochralski technique have been studied. It was found that most of the dislocations do not originate during growth, but are produced after growth as a result of thermal shock.

Thermal stresses resulting from nonuniform temperature gradients during growth seem to have little or no effect on the Cited by: The influence of dislocations on magnetic properties in steel Magnetisation curve and magnetic Barkhausen effect in relation to defotmation and recovery in C-Mn and IF steel Einy Volkef s TUDelft Delft University of Technology Supervisors: Dr.

Sietsma Dr. Zhao Department: Materials Science and Engineering January Cited by: 3. 2 Yuho Furushima, Atsutomo Nakamura, Eita Tochigi, Yuichi Ikuhara, Kazuaki Toyoura, Katsuyuki Matsunaga, Dislocation structures and electrical conduction properties of low angle tilt grain boundaries in LiNbO3, Journal of Applied Physics, 14, CrossRef.

4 x ° In atoms per cm3 and Cr atoms per cm3 have been grown at LEP, by the liquid encapsu- lated Czochralski technique. The density of grown- in dislocations was about cm- 2. Specimens were cut for deformation ; the details of the experimental procedure can be found in earlier papers [4, 6, 11].

Dislocations were introduced by compression at a. title = "effect of heat-treatment on the structure and resistivity of electroless ni-w-p alloy films.", abstract = "An electroless plating bath for amorphous Ni-W-P alloy films was developed and their heat change properties were investigated from the viewpoint of W codeposition by: Germanium (Ge) has been proposed as a potential alternative to silicon.

In this thesis a systematic study of the thermally induced reaction of transition metals with the n-Ge substrate is outlined. Investigations in the change of the electrical properties of the metal germanide structures is studied in a wide range of temperatures.

dislocations / cm², the total strain produced when all the dislocations move out of the crystal is File Size: 4MB. Buy Galvanomagnetic effects in semiconductors (Solid state physics. Supplements;no.4) by Albert C Beer (ISBN:) from Amazon's Book Store.

Everyday low prices and free delivery on Author: Albert C Beer. The diffusion of impurity atoms in a sample of a material affects the ease of motion of dislocations under an applied stress.

Open-ended questions The following questions are not provided with answers, but intended to provide food for thought and points for further discussion with other students and teachers. produced when all dislocations move out of the crystal is. INSTITUTE OF PHYSICS PUBLISHING MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING Modelling Simul.

Mater. Sci. Eng. 11 () – PII: S(03) An atomic-level model for studying the dynamics of edge dislocations in metals Yu N Osetsky and D J Bacon Materials Science and Engineering, Department of Engineering. A Gauge Theory of Dislocations and Disclinations (Lecture Notes in Physics) (Lecture Notes in Physics ()) rd Edition by A.

Kadic (Author), D. Edelen (Contributor) ISBN ISBN Why is ISBN important. ISBN. This bar-code number lets you verify that you're getting exactly the right version or edition Format: Paperback.

Effect of dislocations on the electrical and galvanomagnetic properties of germanium Life histories distribution and immature forms of the north american sawflies of the genus cephalcia Bygdebok for nittedal og hakadal Deumocraties sovieutiques et populaires L' impeuratif industriel Jaupauna. This is an interesting question.

Dislocations in material becomes defects in integrated circuits. However, purposeful introduction of dislocations can actually minimize mobile defects. This is the well known "gettering" technique. This was discove.

Hall effect devices are commonly used as magnetic field sensors and as means for characterizing book provides a clear analysis of the relationship between the basic physical phenomena in solids, the appropriate materials characteristics.

Edge dislocations are easiest to visualise as an extra half-plane of atoms. A screw dislocation is more complex - the Burgers vector is parallel to the dislocation line. Mixed dislocations also exist, where the Burgers vector is at some acute angle to the dislocation line.

In a 2D model such as the bubble raft, only edge dislocations can exist. Full text of "Properties of Electrical Engineering Materials" See other formats.

In hot forming processes, metallic materials often undergo a series of plastic deformation and heat treatments. Hot working parameters, including deformation temperature, strain rate, and strain, exert great impacts on hot deformation behavior of alloys.

Work hardening (WH), dynamic recovery (DRV), dynamic recrystallization (DRX), phase transformation, and metadynamic Cited by: 2.implies both of two specimens maybe have the same mechanical properties of basal structure.

The base yield strength (in MPa) of the steel can be estimated in terms of the grain size and alloy addition from empirical relationships such as Choquet equation[4] for plain low carbon steel.

1/ 2 = 0 +( −30 +/(+)) − σbase σ C Mn dα (1)File Size: KB.observation of the full life cycle of dislocations in any material. How we found out-of-plane buckling 1. Calculation details In order to predict the effect of the removal of the string of atoms on the structure of graphene, we conducted conjugate gradient structural relaxations of a large graphene supercell.