PHYSICAL CHEMISTRY 4
6 credits during the 1st year of 9017 Materials Science and Engineering (LM-53) GENOVA
6 credits during the 2nd year of 9017 Materials Science and Engineering (LM-53) GENOVA
OVERVIEW
The course is characteristic for the inorganic - physical chemistry address
AIMS AND CONTENT
LEARNING OUTCOMES
The course has the objective to present to the student the effect of a magnetic field on different systems. The effect of a magnetic field on a gas, a liquid or a solid (organic or inorganic) will be studied. The main thecnological materials and compounds with applicative properties will be carefully analysed: permanent magnets, soft magnets, magnetic steels.
Teaching methods
Oral lessons and laboratory experiments
all the lessons will be introduced by slides (AULAWEB download) achievable before the beginning.
SYLLABUS/CONTENT
Magnetic properties
Introduction –Units in magnetism. SI and C.G.S. systems.
Origin of the magnetic moment: Orbital and spin magnetic moment from quantum mechanics.meccanica quantistica. Hund rules and Russell-Saunders coupling. Diamagnetism: Origin ol diamagnetism; diamagnetic substances; Pascal law. Paramagnetism: Langevin theory; quantum mechanics treatment and Brillouin function; Curie and Curie-Weiss laws.
Magnetism in transition metal complexes. Paramagnetism of conduction electrons; Landau diamagnetism .
Ordered magnetic systems: Weiss Theory, Heisenberg model, Band model; Superexchange Theory; RKKY Theory.
Magnetic anisotropy; magnetic domains, the hysteresis cycle; Remanence and coercive field.
Ferromagnetism: Stoner-Wohlfart model, dependence form magnetic field and temperature.
Antiferromagnetism: Molecular field Theory; metamagnetic transitions (first and second order); spin-flip and spin-flop transitions
Ferrimagnetism: Molecular Field Theory; dependence from temperature and magnetic field; compensation temperature; Rare Earth - transition metals compounds
Superparamagnetism: Langevin Theory applied to superparamgnetic nanoparticles; Blocking Temperature
Molecular Magnetism: Interazioni di scambio in sistemi di spin organici. Blaney-Bowers Theory; exchange interactions in organic spin systerms.
Hard and soft magnets; magnetic steels
Laboratory:
Magnetic flux measure of different permanent magnets
a.c. magnetic susceptibility measurements on magnetic nanoparticles dispersed in liquid
SQUID magnetometry of a commercial permanent magnet
RECOMMENDED READING/BIBLIOGRAPHY
O'Handley Modern magnetic materials
J.M.D.Coey Rare earth-iron permanent magnets
TEACHERS AND EXAM BOARD
Exam Board
FABIO MICHELE CANEPA (President)
CRISTINA ARTINI
DAVIDE PEDDIS (President Substitute)
MASSIMO OTTONELLI (Substitute)
LESSONS
Teaching methods
Oral lessons and laboratory experiments
all the lessons will be introduced by slides (AULAWEB download) achievable before the beginning.
LESSONS START
From October 19 2020
ORARI
L'orario di tutti gli insegnamenti è consultabile su EasyAcademy.
EXAMS
Exam description
oral exam.
Assessment methods
The preparation of the student will be evaluated by his ability to solve experimental and theoretical simple problems.