Ing Ind - Inf (Mag.)(ord. 270) - BV (478) NUCLEAR ENGINEERING - INGEGNERIA NUCLEARE
096075 - THIN FILMS: MAGNETISM AND SUPERCONDUCTIVITY
Ing Ind - Inf (Mag.)(ord. 270) - MI (486) ENGINEERING PHYSICS - INGEGNERIA FISICA
054349 - MAGNETISM, SUPERCONDUCTIVITY AND SPINTRONICS (C.I.)
054853 - MAGNETISM AND SUPERCONDUCTIVITY
Ing Ind - Inf (Mag.)(ord. 270) - MI (491) MATERIALS ENGINEERING AND NANOTECHNOLOGY - INGEGNERIA DEI MATERIALI E DELLE NANOTECNOLOGIE
096075 - THIN FILMS: MAGNETISM AND SUPERCONDUCTIVITY
The course presents the two most important manifestation of ordering phenomena in solids: magnetism and superconductivity. The two are crucial for the understanding of the transport properties of crystalline materials, and can be exploited in a multitude of applications. Magnetism and superconductivity are governed by microsopic interactions, ultimately among electrons, but the macrosopic phenomenology is the result of interactions and dimensionality.
The objective of the course is thus to provide a broad knowledge and understanding of ordering phenomena in solids. Phenomenology, experimental methods and theoretical models will be considered and confronted, with the aim of broadening the student's knowledge of ordering phenomena in solids and to underline how dimensionality influences them.
Risultati di apprendimento attesi
Lectures and exercise sessions will allow students to:
• Know the fundamental concepts of ordering phenomena
• Recognise the different types of magnetic order
• Know the general phenomeonology of superconductivity
• Determine which experimental methods can be used in the study of magnetism and supeconductivity and, in general , of ordering phenomena in solids
• Read and understand original reaserach papers in the fields of magnetism and supeconductivity
• Present a brief seminar on basic concepts and advanced examples on modern magnetism and superconductivity
Therefore, after passing the exam, the student will be able to:
DD1 - Understand the principles of magnetism and order phenomena, know the terminology related to them, employ the basic models applicable to them
DD2 - Recognize analogue of magnetism and superconnductivity in other contexts and apply models ant techniques in new contexts of physics and tecnology
DD4 - Communicate her/his own perception of basic physics phenomena in a formal presentation
Magnetism of isolated magnetic moments Phenomenology: recalling diamagnetism, paramagnetism.
Atomic moments. Hunds rules Crystal field: origin of CF, quenching of orbital moments, Jahn-Teller effect.
Exchange interaction Examples of simple 3d transition metal oxides (NiO, MnO, Fe3O4) Perovskites Manganites and cuprates
Magnetic order and magnetic structures. Heisenberg and Ising models
Magnetism in metals Pauli paramagnetism Landau diamagnetism Stoner model RKKY interaction, Kondo effect
Excitations in magnetic systems Spin waves Stoner excitations
Magnetism at low dimensionality Spin chains and spin ladders 2 dimensional magnets Thin films
Superconductivity: Phenomenology: transport, susceptibility, thermodynamics London equations Josephson effect Ginzburg-Landau model BCS theory Cuprate superconductors (also as an example of 2D antiferromagnets).
Experimental techniques. Magnetic resonances, Mössbauer spectroscopy, muon spin rotation. Elastic and inelastic scattering of neutrons and x-rays for magnetic structure and magnetic excitations. Magneto-optical techniques.
General physics (in particular electromagnetism) Quantum physics Structure of matter and atomic physics Avanced anlaysis and linear algebra Solid state physics.
Modalità di valutazione
The exam consists of two parts held during a single interview, in English.
1) A seminar of 20-25 minutes, on a subject pre-assinged by the teacher. The student has to present the genral concepts of the theme in a correct and complete way, providing some examples at the level of the lectues and of the teext book. The student is also invited to look for original examples, applications, interconnections with other subjects, to demonstrate a higher level of understanding. A powerpoint presentation is best suited for the seminar, but black/white board option is also possible.
2) Two or three questions on the core of the course as presented in the lectures. The student is requested to answer at the black/white board to show her/his understanding of the basic concepts and notions of the course. Theoretical and experimental aspects will be valued equally important.
A fully successful exam (27-30/30) will be deemed when a solid and broad mastering of the concepts of ordering phenomen in solids is demonstrated.
An average grade (22-26/30) will be the result of failry complete understandig of individual themes but with limited interconnection among subjects.
A pass level (18-21/30) will correspond to a minimum knwleged of individual notions.
S. Blundell, Magnetismm in condensed matter, Editore: Oxford University Press, ISBN: 978-0198505914
Harald Ibach , Hans Lüth, Solid-State Physics: An Introduction to Principles of Materials Science, Editore: Springer, ISBN: 978-3540938033
Tipo Forma Didattica
Ore di attività svolte in aula
Ore di studio autonome
Laboratorio Di Progetto
Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua
Disponibilità di materiale didattico/slides in lingua inglese
Disponibilità di libri di testo/bibliografia in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
Disponibilità di supporto didattico in lingua inglese