327-2139-00L  Diffraction Physics in Materials Science

SemesterFrühjahrssemester 2022
DozierendeR. Erni
Periodizitätjährlich wiederkehrende Veranstaltung
LehrspracheEnglisch



Lehrveranstaltungen

NummerTitelUmfangDozierende
327-2139-00 GDiffraction Physics in Materials Science
10-12 lecture, 12-13 exercises
3 Std.
Mo09:45-12:30HIT J 52 »
R. Erni

Katalogdaten

KurzbeschreibungThe lecture focuses on diffraction and scattering phenomena in materials science beyond basic Bragg diffraction. Introducing the 1st-order Born approximation and Kirchoff’s theory, diffraction from ideal and non-ideal crystals is treated including, e.g., temperature and shape effects, ordering phenomena, small-angle scattering and dynamical diffraction theories.
Lernziel• To become familiar with advanced diffraction phenomena in order to be able to explore the structure and properties of (solid) matter and their defects.

• To be able to judge what type of diffraction method is suitable to probe what type of materials information.

• To build up a generally applicable and fundamental theoretical understanding of scattering and diffraction effects.

• To be able to identify limitations of the methods and the underlying theory which is commonly used to analyze diffraction data.
InhaltThe course provides a general introduction to advanced diffraction phenomena in materials science. The lecture series covers the following topics: derivation of a general scattering theory based on Green’s function as basis for the introduction of the first-order Born approximation; Kirchhoff’s diffraction theory with its integral theorem and the specific cases of Fresnel and Fraunhofer diffraction; diffraction from ideal crystals and diffraction from real crystals considering temperature effects expressed by the temperature Debye-Waller factor and by thermal diffuse scattering, atomic size effects expressed by the static Debye-Waller factor and diffuse scattering due to the modulation of the Laue monotonic scattering as a consequence of local order or clustering; the basics of small-angle scattering; and finally approaches used to treat dynamical diffraction are introduced and exemplified by performing simulations. In addition, the specifics of X-ray, electron and neutron scattering are being discussed. The course is complemented by a lab visit, selected exercises and short topical presentations given by the participants.
SkriptFull-text script is available covering within about 100 pages the core topics of the lecture and all necessary derivations.
Literatur- Diffraction Physics, 3rd ed., J. M. Cowley, Elsevier, 1994.

- X-Ray Diffraction, B. E. Warren, Dover, 1990.

- Diffraction from Materials, 2nd ed., L. H. Schwartz, J. B. Cohen, Springer, 1987.

- X-Ray Diffraction – In Crystals, Imperfect Crystals and Amorphous Bodies, A. Guinier, Dover, 1994.

- Aberration-corrected imaging in transmission electron microscopy, 2nd ed., R. Erni, Imperial College Press, 2015.
Voraussetzungen / BesonderesBasics of crystallography and the concept of reciprocal space, basics of electromagnetic and particle waves (but not mandatory)

Leistungskontrolle

Information zur Leistungskontrolle (gültig bis die Lerneinheit neu gelesen wird)
Leistungskontrolle als Semesterkurs
ECTS Kreditpunkte3 KP
PrüfendeR. Erni
FormSessionsprüfung
PrüfungsspracheEnglisch
RepetitionDie Leistungskontrolle wird in jeder Session angeboten. Die Repetition ist ohne erneute Belegung der Lerneinheit möglich.
Prüfungsmodusmündlich 30 Minuten
Diese Angaben können noch zu Semesterbeginn aktualisiert werden; verbindlich sind die Angaben auf dem Prüfungsplan.

Lernmaterialien

Keine öffentlichen Lernmaterialien verfügbar.
Es werden nur die öffentlichen Lernmaterialien aufgeführt.

Gruppen

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Einschränkungen

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Angeboten in

StudiengangBereichTyp
Materialwissenschaft MasterWahlfächerWInformation
Physik MasterAllgemeine WahlfächerWInformation