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Nuclear magnetic and quadrupole moments, origin of
electric and magnetic fields at nuclei of atoms
of condensed matter (CM), hyperfine splitting and
its use in CM studies (nuclear magnetic resonance,
Moessbauer effect). Spontaneous order of nuclear
moments, van Vleck systems, nuclear adiabatic
demagnetization, 'negative' temperatures.
Last update: T_KFNT (23.05.2003)
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After passing the lecture students will gain detailed knowledge about physical principles of hyperfine interactions in solids as well as basic knowledge how to derive parameters (strength) of such interactions from the electronic structure of solids. Furthermore, students will be introduced to the subject of Van Vleck systems, where the crystal field plays an important role, and hyperfine-enhanced nuclear magnetism in such systems. The ordering of nuclear moments will be demonstrated for the case of the PrNi5 compound. Last update: KFNTJKU/MFF.CUNI.CZ (16.04.2008)
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oral exam Last update: Čížek Jakub, prof. Mgr., Ph.D. (10.06.2019)
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E.N. Kaufmann, R.J. Vianden: The electric field gradient in noncubic metals, Reviews of Modern Physics 51 (1979) 161
T.P. Das: Calculation of magnetic and electric hyperfine fields in metals, Physica Scripta 11 (1975) 121
J. Kuriplach, J. Šebek, R.M. Mueler: Calculation of magnetic properties and specific heat for the nuclear enhanced ferromagnet PrNi5, Journal of Low Temperature Physics 120 (2000) 401 Last update: KFNTJKU/MFF.CUNI.CZ (16.04.2008)
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lecture Last update: KFNTJKU/MFF.CUNI.CZ (16.04.2008)
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Oral exam will include questions covering topics presented in lectures during semester. Last update: Čížek Jakub, prof. Mgr., Ph.D. (10.06.2019)
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Basic properties of nuclei, origin of the nuclear magnetic and quadrupole moments, multipole expansion.
Electric field at nuclei in condensed matter, its origin and interaction with nucleus, interaction Hamiltonian, the role of the symmetry of nuclear environment.
Magnetic field at nuclei in condensed matter, its origin and interaction with nucleus, interaction Hamiltonian, interaction of nucleus with the orbital and spin electron moments.
Calculation of nuclear energy levels for simple interaction Hamiltonians.
Hyperfine splitting of nuclear levels and its use in condensed matter studies, nuclear magnetic resonance, Mössbauer spectroscopy and other experimental methods.
Examples of usage of 'hyperfine methods.' Possibilities of calculation of hyperfine parameters from first principles.
Interactions among nuclear moments, their spontaneous ordering and its experimental detection.
Crystal field (CF), singlet CF ground state, van Vleck systems, hyperfine enhanced nuclear magnetism.
Nuclear adiabatic demagnetization, 'negative' temperatures. Examples of systems with nuclear ordering. Last update: T_KFNT (23.05.2003)
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