Fall Semester 2006, Tuesday and Thursday: 9:30 - 10:50 a.m. Room: physics 56

lecturer: Ruslan Prozorov, office: Zaffarano A119, office phone: 294-9901, prozorov@ameslab.gov

prerequisites: 304 Thermal Physics and 322 Introduction to Modern Physics II

office hours: After lectures, 11AM-12PM

Texts:
Base text:
N. W. Ashcroft and N. D. Mermin, "Solid State Physics", (Holt, Rinehart and Winston, New York, 1976), ISBN: 0-030-83993-9.
Additional:
Ch. Kittel, "Introduction to Solid State Physics", 8th Edition, (John Wiley and Sons, New York, 2004), ISBN 0-471-41526-X
A. A. Abrikosov, "Fundamentals of the Theory of Metals", (Elsevier Science Pub Co., 1988), ISBN: 0-444-87095-4.
L. -P. Levy, "Magnetism and Superconductivity", (Springer, 2000), ISBN: 3-540-66688-5
M. Tinkham, "Introduction to Superconductivity", 2nd edition, (Dover Publications, Inc., New York, 1996), ISBN: 0-486-43503-2.

NOTE: some material will only be available during the lecture and will not appear in the books. All homeworks, tests and exams will be based on the lectures. Therefore, attendance is very important.

Homework: distributed each Tuesday, due on Tuesday a week after.
Paper copy of the solved homework must be placed into the grader's mailbox. Remember indicate your name.
No late submissions will be accepted. Grader:  Mr. Wei Bu [weibu@iastate.edu].

Grading: Based on homework (40%), midterm exam (20%), and final exam (40%).

Week	Date	Lectures/Exams	Homework	Solutions
1	8/22/06	Lecture 1: MAGNETISM:Introduction: magnetic response of substanses. Units, conventions, terminology and definitions. Effects of the shape (demagnetisation factors).
	8/24/06	Lecture 2: Para- and Dia- magnetism: Landau and Larmor diamagnetism. Pauli, Van Vleck and free-moment (Langevin) paramagnetism. Brillouin and Langevin functions.
2	8/29/06	Lecture 3: Magnetic order: Origin of exchange interaction. Types of exchange.	HW1 due 9/5/06	HW1
	8/31/06	Lecture 4: Mean Field Theory: ferromagnetic transition, Curie-Weiss law. Ferro-, ferri- and antiferro- magnetic materials.
3	9/5/06	Lecture 5: Magnetism of real samples: Magnetic domains. Soft and Hard ferromagnets. Pinning. Size effects (superparamagnetic limit).	HW2 due 9/12/06	HW2
	9/7/06	Lecture 6:  Experimental methods. Imaging of magnetic domains. DC and AC Magnetometry, neutron scattering, x-ray diffraction, calorimetry, magnetic resonances.
4	9/12/06	Lecture 7: Spin Waves: ferromagnetic and antiferromagnetic spin waves	HW3 due 9/19/06	HW3
	9/14/06	Lecture 8: Anisotropy: origin of magnetocrystalline anisotropy, uniaxial and cubic cases, magnetostriction, surface versus bulk magnetism. Kramers theorem and Jahn-Teller distortion.
5	9/19/06	Lecture 9: Size effects: ferromagnetic materials at the nanoscale. Superparamagnetism. Irreversibility under superparamagnetic blocking. Magnetic relaxation.	HW4 due 9/26/06	HW4
	9/21/06	Lecture 10: Itinerant Magnetism: basic principles of band magnetism. Stoner instability and candidate materials (Fe, Co, Ni)
6	9/26/06	Lecture 11: Thermodynamics: magnetic energy and work, thermodynamic potentials. Phase transitions: Ehrenfest classification: entropy behavior at the transition	HW5 due 10/3/06	HW5
	9/28/06	Lecture 12:  Landau theory of phase transitions: order parameter and  correlation length. Second-order transitions.
7	10/3/06	Lecture 13: Fluctuations: Ornstein-Zernike theory; renormalization and scaling laws.	HW6 due 10/10/06	HW6
	10/5/06	Lecture 14: First Order Transitions:  metastability and phase decomposition
8	10/10/06	Lecture 15:  Overview of magnetism - preparation for the Midterm Exam	HW7 due 10/17/06	HW7
	10/12/06	Lecture 16:  SUPERCONDUCTIVITY: Experimental Facts: Meissner effect, persistent currents, isotope effect. Characteristic lengths and critical parameters.
9	10/17/06	Lecture 17: London theory: explanation of the Meissner effect. Magnetization. Current and field distributions. Demagnetization factors.	no HW - prep for exam	mideterm solutions
	10/19/06	MIDTERM EXAM (Magnetism Only)
10	10/24/06	Lecture 18: Bardeen-Cooper-Schrieffer (BCS) Theory: Cooper pairs, pair occupancy, energy gap, transition temperature, thermodynamic quantities	HW8 due 10/31/06	HW8
	10/26/06	Lecture 19: BSC II : Temperature-dependent gap, excitation spectrum, density of states, coherence length, unconventional superconductors (non s-wave  pairing)
11	10/31/06	Lecture 20: Ginzburg-Landau Theory - I: Complex order parameter. Characteristic lengths. Correspondence between BCS and GL theories.	HW9 due 11/7/06	HW9
	11/2/06	Lecture 21: Ginzburg-Landau Theory - II: Energy of S/N boundary, proximity effect, critical current of thin wire. Type I and type II superconductors.
12	11/7/06	Lecture 22: Type I and type II superconductors: Intermediate and mixed states. Structure of Abrikosov vortex from G-L theory. Reversible magnetization. Flux flow.	HW10 due 11/14/06	HW10
	11/9/06	Lecture 23: Irreversible properties I: microscopic origins of flux pinning, critical current, single-vortex pinning, collective pinning.
13	11/14/06	Lecture 24: Irreversible properties II: Bean model, irreversible magnetization, critical current, flux creep. Electric field in superconductors	HW11 due 11/28/06	HW11
	11/16/06	Lecture 25: Experimental methods: Electromagnetic and thermal measurements at low temperatures. Spectroscopy. Angle-resolved photoemission. Neutron scattering. NMR.
	11/20-26	THANKSGIVING BREAK - NO CLASSES
14	11/28/06	Lecture 26: Josephson Effect: tunneling of single electrons and Cooper pairs. Various types of junctions.	HW12 due 12/5/06	HW12
	11/30/06	Lecture 27: DC and AC Superconducting Quantum Interference Device (SQUID): how to measure a magnetic field using Cooper pairs
15	12/5/06	Lecture 28: Coexistence of superconductivity and magnetism: (anti) ferromagnetic superconductors, gapless superconductivity, Larkin-Ovchinnikov-Fulde-Ferrell state
	12/7/06	Lecture 29: Nonequilibrium effects in Superconductors: Quasiparticles, Andreev reflection, thermoelectric effects
16	12/14/06	FINAL EXAM: Thursday, 9:45 AM . (see http://www.iastate.edu/~registrar/exams/)