Physics of Magnetic Materials Field of study: Physics
Programme code: W4-S2FZA22.2.2021

During the lecture, the student becomes familiar with such issues as: 1. Introduction – history of magnetism 2. Source of magnetism. Origin of atomic magnetic moments (spin and orbital electron states, vector model). 3. Diamagnetism, quantum diamagnetism. 4. Paramagnetism of free ions (Brillouin function, Curie law). 5. Magnetically ordered states (spin-orbit coupling, types of exchange interactions, Weiss field). 6. Ferromagnetism, antiferromagnetism, ferrimagnetism, band magnetism. własności magnetyczne materiałów, a ich struktura elektronowa 7. Magnetism in amorphous systems 8. Magnetism in systems containing rare earths 4f and transition metals 3d. Models of magnetism in 4f-3d systems. 9. Domain structure and magnetization processes (free energy, types of magnetic anisotropy) 10. Progress and future of magnetic materials: • New hard and soft magnetic materials • Magnetic nanoparticles and their properties (e.g. core-shell systems, exchange bias phenomenon) • Superparamagnetism and 2D magnetism (Stoner-Wohlfarth model, magnetoresistance, 2D magnetic materials for spintronic applications) • Magnetocaloric effect and its application The lecture ended with an obligatory exam. During conversational classes students participate in the discussion of problems presented in the lecture. During five two-hour meetings, issues related to magnetism in various magnetic materials are discussed in detail, current literature data is presented. At the beginning of semester students are informed about the range of issues to be discussed. The final grade of the conversational classes is determined by the student activity. During laboratory classes, students are acquainted with Magnetic Measurement Techniques (static, dynamic, magnetometers, SQUID magnetometer). They conduct experiments under the guidance of the teacher. Using devices such as magnetic balances and the SQUID magnetometer, they examine the properties of various magnetic substances in various temperature ranges and magnetic fields. The selection of the research method is discussed in terms of obtaining the desired result as well as the conditions (temperature, magnetic field) in which the experiment will be performed. At the beginning of semester students are informed about the research methods they will use. After completing the experiment, the student presents a report containing theoretical introduction to the problem, the methodology adopted, the description of the study, analysis and discussion of the results and their relevance to similar studies. Module prerequisites: knowledge of general physics and quantum mechanics at an intermediate level The module grade is the average of the exam, conversational and laboratory classes.

knowledge of general physics and quantum mechanics at an intermediate level

C. Kittel, Intorduction to solid state physics J. M. D. Coey, Magnetism and Magnetic Materials, 2012 Cambridge University Press Handbook of Magnetic Materials, edited by K.H.J. Buschow, vol.22, Elsevier B. D. CULLITY, C. D. GRAHAM, INTRODUCTION TO MAGNETIC MATERIALS, 2009 by the Institute of Electrical and Electronics Engineers, Inc., Published by John Wiley Magnetic Nanostructured Materials From Lab. to Fab, Edited by A. A. El-Gendy, J.M. Barandiarán and R. L. Hadimani, Elsevier 2018 A. M. Tishin, Y. I. Spichkin, The Magnetocaloric Effect and its Applications, IOP Publishing Ltd 2003 Scientific papers selected by the lecturer Polish books: Andrzej Szewczyk, Andrzej Wiśniewski, Roman Puźniak, Henryk Szymczak, Magnetyzm i nadprzewodnictwo, 2012 Wydawnictwo Naukowe PWN Allan H. Morrish, Fizyczne podstawy magnetyzmu, PWN Warszawa 1970