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.

       

       

      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

      URL Aula web
      PHYSICAL CHEMISTRY 4
      https://smfc.aulaweb.unige.it/course/view.php?id=755
  • Who
  • How
    • TEACHING METHODS

      Oral lessons and laboratory experiments

      all the lessons will be introduced by slides (AULAWEB download) achievable before the beginning.

      EXAM DESCRIPTION
      ASSESSMENT METHODS

       

      The preparation of the student will be evaluated by his ability to solve experimental and theoretical simple problems.

       

  • Where and when
    • URL Aula web
      PHYSICAL CHEMISTRY 4
      https://smfc.aulaweb.unige.it/course/view.php?id=755
      Sessions
      Date Time Type Place Notes
      16 febbraio 2018 9:00 Orale Genova
      8 giugno 2018 9:00 Orale Genova
      22 giugno 2018 9:00 Orale Genova
      13 luglio 2018 9:00 Orale Genova
      27 luglio 2018 9:00 Orale Genova
      13 settembre 2018 9:00 Orale Genova
  • Contacts