Magnetism and Magnetic Materials: Course Outline (PH-620)
Magnetism and Magnetic Materials provides an important forum for the disclosure and discussion of original contributions covering the whole spectrum of topics
Course Outline
- Introductory magnetism.
- Review of diamagnetism and paramagnetism.
- Quantum mechanical treatment of magnetism.
- Brillouin Function.
- Curie Law and applications.
- Pauli paramagnetism.
- Wave functions of magnetic ions (3d, 4f).
- Spin-orbit coupling.
- Crystal field effects.
- Jahn-Teller theorem.
- Thermodynamics of magnetism.
- Free energy and entropic considerations.
- Adiabatic demagnetizationFerro and Antiferromagnetism.
- Basic Phenomenon.
- Mean Field Theory.
- Thermodynamics of ferromagnetic systems.
- Quantum mechanical treatment.
- Exchange interactions.
- Heisenberg and Ising model.
- Indirect exchange (superexchange and RKKY).
- Spin excitations.
- Spin waves.
- Magnons.
- Application to the temperature dependences of magnetization an specific heat.
Course Outline
- Band ferromagnetism.
- Criteria for band ferromagnetism.
- Examples of metallic ferromagnets.
- Anti-
Ferromagnetism. - Basic phenomenon.
- Mean Field treatment.
- Type I, Type II Antiferromagnets.
- Parallel and perpendicular susceptibilities.
- Spin flop transition.
- Ferrites.
- Applications of ferrites.
- Domain Structures and related properties of ferromagnetsMagnetic Anisotropy.
- Basic phenomenology.
- Uniaxial.
- Cubic and surface Anistropies.
- Effects in bulk materials and thin films.
- Domain Formation.
- Domain wall width.
- Relation to magnetic anisotropy.900, 1800 dmain walls.
- Observation of domains.
- Domain wall motion.
- Pinning of domain walls.
- Magnetization in soft and hard magnets.
- Magnetization reversal mechanisms.
- Coherent modes of spin reversal.
- Finite size effects Single Domain Particles and their Magnetic Properties.
- Anisotropies.
- Coercive fields and magnetization Stoner- Wohlfarth theory.
- Superparamagnetism and time decay of magnetization.
- Neel-Brown models.
- Exchange bias effects.
- Dynamic response and applications of single domain particles in magnetic recording.
- Reversal mechanisms in single domains.
- Thin films and surface effects.
Recommended Books
-
Pernanent magnetism
by Skomsi, Ralph | J. M. D. Coey
Published by :Tylor & Francis (New York) -
The physical principles of magnetismby Morrish, Allan H.
Published by : IEEE Press (New York)
ISBN: 078036029 (hb) -
Introduction to solid state physics
by Kittle, Charles
Edition statement:8th ed.
Published by : Wiley India Pvt. Ltd. (New Delhi)
E-Books
-
Oxford Graduate Texts : Simple Models of Magnetism
by Skomski, Ralph
Publisher: OUP Oxford
ISBN: 9780191524752 -
Physics of Magnetism and Magnetic Materials (1)
by Buschow, K.H.J
de Boer, F.R.
Publisher: Springer