Titulación Grado en Ingeniería de Materiales Ficha de Asignatura: Properties of Materials II

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1 Department (Faculty) FISICA APLICADA (ETSI de Telecomunicacion) Name of the Subject Code Magnetic and thermal properties of materials Credits ECTS Type Year/Semester Duration Language 6 OB 3/1 Semester English Justification and goals (PLAN OF STUDIES) The main goal of this topic is to provide the student with the basic knowledge of the magnetic and thermal properties of most common industrial materials. Magnetic materials have a vital importance in a wide variety of applications at the industrial level, like computers (hard drives and reading heads, etc.), permanent magnets (motors, actuators, etc.), magnetic shielding, sensors, etc. The student will learn the general concepts required to understand the basis of all the applications mentioned. In parallel, the thermal properties of materials are also fundamental to understand a great number of applications in modern industry. The student will learn the basic concepts governing heat diffusion and the physical properties that lead to the thermal conductivity of different materials. Within the subject of thermal transfer, we will only cover the transfer within materials (diffusion and briefly convection). We do not cover radiation, which is a subject more appropriate for other topics. Previous Requirements (PLAN OF STUDIES) No particular previous knowledge is required, apart from the general concepts in material science, physics and mathematics expected of a third year student. Previous knowledge of the Student General mathematics. Electromagnetism. Mechanical and electric properties of materials. Boltzmann statistics (thermodynamics). Solid State (crystallography, band theory, etc.). Very general concepts of quantum physics. Direct links with other Subjects (PLAN OF STUDIES) Properties of Materials I, Electromagnetism, Thermodynamics and Quantum Physics General Skills (PLAN OF STUDIES) CG3, Written and Oral communication. CG4, Proper use of the Communication Technologies CG11, Ethical and professional responsibility Specific goals and skills (PLAN OF STUDIES) - Understanding of the basic concepts of the magnetism in materials. - Understanding of the basic concepts of the thermal properties in materials and the thermal transfer. - Solving problems applied to industry, especially when working in a group. - Oral presentations with modern topics related to the subject.

2 Code LR1 LR2 LR3 LR4 LR5 LR6 LR8 Learning Result Understand the basic behavior of the different materials within a magnetic field Understand the atomic origin of the magnetism in the mater Understand the cooperative effects in ferromagnetic materials. Understand the technical magnetism and its technological applications Understand the phenomenology of the thermal behavior of different materials. Understand the theoretical models behind the thermal behavior of materials. Understand the technological applications of heat diffusion and heat propagation. Learn the basis of giving a good presentation in English 1 Evaluating the subject ACHIEVEMENT INDICATORS Week Indicator Relation with LR 1 Knowledge of the basic concepts of the LR1 magnetic fields and the magnetism in the mater. Knowledge of the main magnetic units and the resolution of magnetic circuits. 2 Understanding of the concept of LR2-LR3 paramagnetism and ferromagnetism. Knowledge of the different in orders of magnitude in the response of the different materials to the magnetic field 3 Understanding of the interaction of the LR3, LR4 magnetism with the crystalline field. Understanding of the phenomenology of the magnetic anisotropy and its different origins. Minimize the magnetic energy of a system. 4 Understanding of the magnetostriction LR3, LR4 and the magnetoelastic effects. Knowledge of some applications of magnetostriction 5 Knowledge of the concept and structure LR4 of a magnetic domain wall. Understanding of the reversible and irreversible magnetization processes. 6 Knowledge of the applications of magnetic materials. Transport properties in some ferromagnetic LR4

3 structures and their application to sensors and magnetic recording. 7 Understanding of the basic concepts of the kinetic theory and the Boltzmann statistics. 8 Understanding the diffusion equation and the heat transfer mechanisms Understanding of the key points to give a good presentation in English Distinguish the different processes to transfer heat. Use properly the model to transfer heat in stationary state and 1D. 13 Understand the basis of unsteady state and the routines to solve basic problems Understand the origin of the thermal conductivity and heat capacity in the different materials. Understand the concept of phonon and Debye temperature. LR5-LR6 LR8 LR6 Contents and distribution of the lectures (LM: Lecture, RP: Solving problems, LB: Laboratory, TI: Individual work, TG: Work in group, DB: Debate in the Classroom, VI: Visits, EV: Tests and Exams, OT: Other Procedures) Please note that the course starts with magnetism some years and with magnetic properties other years (generally alternating), in order to change the subjects of the essays. In the table below we show the contents of the subject. The lectures are divided in theoretical lectures and resolution of problems (LM), directed resolution of problems (RP), Tests and Exams (EV) and a Final Exam if required. Students will solve several individual works (TI) and also some challenge problems solved in small groups. Part of the score will be also an essay in groups of two that will be presented in the classroom. Week Lesson (LM) RP LB EV Work 1 Presentation (0.) Introduction to magnetism (2.5h) Magnetic moment. B,H, M, A fields, Sources of magnetic field. Magnetic 1.5h energy. Magnetic circuit. Demagnetizing field. 2 Magnetism of the matter I () Diamagnetism, paramagnetism, ferromagnetism I. 3 Magnetic anisotropy () Magnetocrystalline anisotropy, Uniaxial anisotropy. Induced magnetic anisotropy, magnetic annealing, plastic deformation, shape anisotropy. 4 Magnetostriction () Phenomenology, mechanism,

4 Titulación measurements, anisotropy induced by stresses. Other magneto elastic effects. Magnetoelastic devices Magnetic domains () Origin, types and energy. Magnetic domain structure. Magnetization process. Hysteresis loop. Lectures on modern Magnetism. (One or two of the following topics) Magnetic recording () Spintronics () Magnetic materials and their applications () Magnetic nanoparticles () Magnetism and biology () Introduction to thermal properties. () Kinetic molecular theory and Boltzmann statistics. Equipartition and Bownian motion Diffusion () Heat diffusion and mass transfer Heat Transfer (1.5h). Thermal conduction, Convection and Radiation Steady State conduction. () Plane Wall. Insulation and R values. Cylindrical systems. Heat sources. Multiple dimensions. Unsteady state. Lumped heat capacity. Biot and Fourier numbers. Transient heat flow, plane, sphere and cylinder. Heisler charts Oral presentations Lattice vibrations (3h) Specific heat models, the phonon, lattice waves, specific heat Debye theory, thermal conductivity Thermal properties of metals and Free electron model (1h) Heat capacity of conduction electrons, thermal conductivity in 1h Partial Exam (2.5h) 0.5h Evaluación parcial (2.5h) metals Total Lecturing: LM: 28 hours, RP: 19 hours (TG: 5 y Ti:14), LB: -- hours, DB: hours, VI:-- hours, EV: 5 hours, OT: 8 hours Tutorials and Supervisions The teacher will set some hours for tutorials and supervisions either in his office or after the lectures. The teacher will evaluate the progress of the students through the work in the classroom and the exams.

5 Evaluation Procedure -Partial Exam I (% of the final score): 35 -Partial Exam II (% of the final score): 35 -Oral presentation. Groups of 2 people. (% of the final score): 20 -Classroom work and Individual work (% of the final score):10 Both Partial exams will have questions and problems similar to those solve during the course. 70% of the total score. The oral presentation will be done about an essay in one of the subjects proposed by the teacher in the first lecture. The way this essay is evaluated will be described during the first lecture. 20% of the total score. The remaining 10% of the total score can be obtained by solving some problems that the teacher will set during the course. Additionally, depending on the time available, the teacher will challenge the students with problems that may be solved in a group and will also count for this 10%. Bibliography Physics of Ferromagnetism, S. Chikazumy Magnetism and magnetic materials, D. Jiles Introduction to Magnetic Materials, B. D. Cullity, C. D. Graham Modern Magnetic Materials: Principles and Applications, Robert C. O'Handley Fundamentos de la teoría electromagnética, Reitz, Milford, Christy Introduction to Solid State Physics, C. Kittel Solid State Physics, Neil W. Ashcroft Heat Transfer, J.P. Holman. Concepts in Thermal Physics, S.J. Blundell and K.M.Blundell Elementary Solid State Physics: Principles and Applications, M. Ali Omar Propiedades mecánicas y térmicas de los materiales, A.M. Collieu, D.J. Powney Ciencia e ingeniería de materiales, W. D. Callister Teachers and distribution of the lectures Main Teacher: Jose Luis Prieto Other Teachers that could do substitution: Claudio Aroca, Marco Maicas, María del Mar Sanz, Manuel Muñoz