Class at Faculty of Mathematics and Physics |

NFPL082

FPL082

Introduction - basic notions, Pauli paramagnetism, specific heat, Curie-Weiss law. Ising model, Heisenberg model.

Electronic structure of 3d, 4d, 5d, 4f, 5f systems. Localized magnetism 4f, Hund's rules. Itinerant magnetism, band splitting, Stoner model. Properties. Exchange interactions.

Diluted alloys

Anderson model, mean field solution, Kondo model, Schrieffer-Wolff transformation, bulk properties

Concentrated systems - Kondo lattice, mixed valence,

Real systems, Fe, Co, Ni, rare-earths, RCo2 systems, exchange interactions, magnetic structures, magnetic excitations (magnons)

Actinide intermetallics, orbital magnetism in itinerant systems, magnetic anisotropy mechanisms

Heavy fermions, finite-T properties

What can be measured and what we can learn. Characteristic time scale approach.

Bulk methods - Magnetic susceptibility, electrical resistivity, specific heat

Local-probe methods - Neutron scattering, Photoelectron spectroscopy, Moessbauer spectroscopy, m+-SR.

Electron correlations in metals with various electron structures. Formation of magnetic moments in 3d metals, lanthanides, actinides. Types of magnetic ordering. Diluted alloys. Experimental studies of electronic properties.

Subject suitable for the 2nd year of PhD course, or for Master course students focusing on magnetism.