DEPARTAMENTO DE FÍSICA

 

Superfluidity, Superconductivity and Magnetism - F

Ano letivo: 2019-2020
Specification sheet

Specific details
course codecycle os studiesacademic semestercredits ECTSteaching language
2003375126pt,en *)

*) N.B.  if there are students who do not speak Portuguese the language is English.

Learning goals
Main learning outcomes:

A deep knowledge of the physics involved in the following topics addressed in this course: Bose-Einstein condensates, superfluidity, superconductivity, magnetism and their technological applications.

A theoretical (at the quantum mechanics level) understanding of the physical phenomena responsible for such states of matter.

Application of previous knowledge of Quantum Mechanics and Statistical Physics to new situations, concerning topics of the program.

Modelling and resolution of specific problems in the area.

Other learning outcomes:

Development of critical reasoning, autonomous work, and laboratory skills in the fields of cryogenics and measurement of electrical and magnetic properties.
Syllabus
Bose-Einstein condensates.
Superfluidity.
Classical and quantum fluids.
The superfluidity of He(II).
Flux quantisation and vortices.
Superconductivity.
Discovery; basic properties of superconductors (electric, magnetic and thermodynamic).
Type I and type II superconductivity.
London's model.
Gunzburg-Landau model.
The BCS theory of superconductivity.
Non-conventional superconductivity and superfluidity.
Magnetism.
Magnetism of isolated atoms: diamagnetism, paramagnetism, Hundt's rules.
Crystal field.
Magnetic interactions: dipolar magnetic interaction, exchange interaction.
Magnetic order: ferromagnetism, antiferromagnetism and ferrimagnetism. Weiss-Néel model.
Magnetic domains.
Kondo effect and Hubbard's model.
Prerequisites
Knowledge of Condensed Matter Physics at a basic level
Generic skills to reach
. Competence in analysis and synthesis;
. Competence to solve problems;
. Critical thinking;
. Competence in autonomous learning;
. Competence in applying theoretical knowledge in practice;
. Competence in organization and planning;
. Competence in oral and written communication;
. Competence in information management;
. Competence to communicate with people who are not experts in the field;
. Adaptability to new situations;
(by decreasing order of importance)
Teaching hours per semester
lectures30
laboratory classes30
total of teaching hours60

Assessment
Laboratory or field work20 %
Problem solving10 %
Exam70 %

Bibliography of reference
Superconductivity, superfluids and condensates, J.F. Annett, Oxford Univ. Press (2004).

Introduction to superconductivity, A.C. Rose-Innes and E.H.Rhoderic, Pergamon Press.

Magnetism in Condensed Matter, S. Blundell, Oxford. Univ. Press (2001).
Teaching method
A few of these topics will be taught in lectures, others will be proposed to students for individual study, after a brief introduction in the lectures.

The students will perform a set of laboratory experiments, such as: measurement of the magnetic susceptibility of paramagnetic salts and determination of effective moment; determination of the Curie temperature and measurement of hysteresis loops in a ferromagnet; synthesis, and characterisation of the electric and magnetic properties of a high-Tc superconductor; etc.
Resources used
Laboratório de Física da Matéria Condensada