31635 - Magnetic Materials

Academic Year 2011/2012

  • Docente: Lucia Del Bianco
  • Credits: 6
  • SSD: FIS/03
  • Language: Italian
  • Teaching Mode: Traditional lectures
  • Campus: Bologna
  • Corso: Second cycle degree programme (LM) in Physics (cod. 8025)

Course contents

Introduction to Magnetism

  • Atomic magnetic moments
  • Exchange interaction
  • Ordered magnetic systems: ferro-magnetism, antiferro-magnetism, ferri-magnetism

Magnetic anisotropy

  • Magnetic anisotropy (general)
  • Magnetocrystalline anisotropy
  • Shape anisotropy
  • Magnetostriction; magnetoelastic anisotropy
  • Formation of magnetic domains
  • Magnetic hysteresis

Size effects

  • Single-domain magnets
  • Magnetic configuration of nanostructured systems: the random anisotropy model
  • Coercivity and size effects
  • Superparamagnetism

Interface phenomena

  • Exchange-bias effect
  • Giant magnetoresistance (GMR)

Nanostructured magnetic systems

  • Soft and Hard nanocrystalline magnetic alloys
  • GMR sensors; spin valves
  • Materials for magneto-recording media

Readings/Bibliography

'Introduction to Magnetic Materials'
by L. C. Cullity (Addison-Wesley)

'Modern Magnetic Materials: Principles and Applications'
by Robert C. O'Handley (Wiley-Interscience)

'Introduction to Magnetism and Magnetic Materials'
by David C. Jiles (Chapman & Hall/CRC)

Review articles from scientific journals (language: English)

Teaching methods

Formal lessons

Assessment methods

Oral test

Office hours

See the website of Lucia Del Bianco