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Course, academic year 2019/2020
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Nuclear Methods in Magnetic Systems Studies - NFPL129
Title in English: Jaderné metody studia magnetických systémů
Guaranteed by: Department of Low Temperature Physics (32-KFNT)
Faculty: Faculty of Mathematics and Physics
Actual: from 2003 to 2019
Semester: winter
E-Credits: 3
Hours per week, examination: winter s.:2/0 Ex [hours/week]
Capacity: unlimited
Min. number of students: unlimited
State of the course: taught
Language: Czech
Teaching methods: full-time
Guarantor: prof. RNDr. Helena Štěpánková, CSc.
prof. RNDr. Jiří Englich, DrSc.
Classification: Physics > Solid State Physics
Annotation -
Last update: T_KFNT (22.05.2001)
Nuclear methods used for determination of crystal, magnetic and electron structure of magnetic materials. NMR, NQR, Moessbauer spectroscopy, NO, PAC, muon spin rotation, nuclear magnetic resonance, Moessbauer spectroscopy, nuclear orientation, perturbed angular distribution and correlation, muon spin rotation.
Aim of the course -
Last update: T_KFNT (11.04.2008)

Nuclear methods used for determination of crystal, magnetic and electron structure of magnetic materials.

Course completion requirements - Czech
Last update: prof. RNDr. Helena Štěpánková, CSc. (10.06.2019)

Ústní zkouška.

Literature - Czech
Last update: T_KFNT (23.05.2003)

Schatz G., Weidinger A., Nuclear Condensed Matter Physics: Nuclear Methods and Applications, Wiley & Sons 2002.

Requirements to the exam - Czech
Last update: prof. RNDr. Helena Štěpánková, CSc. (09.10.2017)

Zkouška je ústní, otázky jsou kladeny dle syllabu.

Syllabus -
Last update: T_KFNT (23.05.2003)
1. Introduction
Properties of magnetics, crystal and magnetic structure. Nuclear electric and magnetic moments, interactions in external fields. Magnetic interaction of nuclei and electrons, hyperfine magnetic fields. Quadrupolar interaction.

2. Nuclear magnetic resonance (NMR)
Pulse techniques. Enhancement of radiofrequency field, excitation of signal NMR in domains and walls. Local magnetic field at nuclei, resonant frequency and its temperature dependence. Resolution, study of defects. Relaxation. Quadrupolar effects - splitting and broadening of NMR lines.

3. Moessbauer spectroscopy
Nuclear transitions-absorption and emission of gamma quanta. Moessbauer effect. Basics of Moessbauer spectroscopy. determination of hyperfine magnetic field, quadrupolar splitting, isomer shift from Moessbauer spectra.

4. Nuclear orientation (NO) and its realisation. Emission of gamma quanta of oriented radioactive nuclei. Methods of perturbated angular distribution (PAD) and correlation (PAC). Nuclear magnetic resonance of oriented nuclei (NMR ON). Basics of experimental techniques. Applications (hyperfine field, relaxation).
5. Muon spin rotation and relaxation
Properties of muons, interactions in solids. Precession of spin in a magnetic field. Experimental arrangement. Application to studies of weak magnetic moments.

6. Neutron diffraction
Neutron scattering on nuclei and electron moments. Experimental equipment. Application - determination of magnetic structure.

 
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