Physics of Magnetic Solids

Garant předmětu:

Jaroslav Hamrle

Lecturer:

Jaroslav Hamrle, Štefan Zajac

Tutor:

Jaroslav Hamrle, Štefan Zajac

Supervisor:

Department of Solid State Engineering

Synopsis:

The origin of the magnetic moment. Fundamental magnetic interactions. Magnetic susceptibility. Diamagnetism and paramagnetism. Substances with spontaneous magnetization - ferromagnetic, antiferromagnetic, ferrimagnetic ordering. Domain structure and magnetization processes. Magnetic relaxation and resonance phenomena. Spintronics.

Requirements:

Syllabus of lectures:

1.Electron spins in hydrogen molecule, exchange energy, Heisenberg Hamiltonian.

2.Spin-orbit interaction, its relation to Dirac equation, fine structure of electron levels, Dresselhaus spin-orbital interaction.

3.Magnetic moment of atom, Landé's g-factor, Hund's rules, Zeeman's energy.

4.Diamagnetism of atomic electrons in solids, Landau's diamagnetism of conductive electrons.

5.Paramagnetism of atoms and ions in solids - Langevin, Brillouin and Van Vleck theory, Pauli spin paramagnetism of conductive electrons.

6.Ferromagnetism, Weiss phenomenological theory and Heisenberg quantum theory, Stoner band theory, temperature dependence of spontaneous magnetization of ferromagnets, magnons.

7.Antiferromagnetism, ferrimagnetism, Neel's theory of effective field.

8.Micromagnetism, exchange, dipole and Zeeman energy, magnetic anisotropy, magnetostriction.

9.Magnetic domains, transition walls between domains, magnetization processes, coercive force, remanent magnetization.

10.Larmor precession of magnetic moment, Landau-Lifshitz-Gilbert equation.

11.Paramagnetic, ferromagnetic and spin-wave resonance, magnetic relaxation.

12.Transport of angular momentum using spin current, generation and detection of spin current, spintronics.

13.Magnetic materials and their applications, magnetic metals and oxides.

Syllabus of tutorials:

Study Objective:

Study materials:

Key references:

[1] Crangle J.: Solid State Magnetism, Springer, New York 2012.

[2] Stöhr J., Siegmann, H.Ch.: Magnetism: From Fundamentals to Nanoscale Dynamics, Springer Berlin 2006

Note:

Time-table for winter semester 2023/2024:

Time-table is not available yet

Time-table for summer semester 2023/2024:

Time-table is not available yet

The course is a part of the following study plans:

• Inženýrství pevných látek (compulsory course in the program)