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Lecturer(s)
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Course content
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1. Magnetic properties of nanostructures - introduction to magnetism of solids (magnetic moment, classical and quantum mechanics of spin), magnetic susceptibility, diamagnetism, paramagnetism, crystal field, magnetic interactions among magnetic moments (magnetic dipolar interactions, origin of exchange interactions, direct, indirect, double and anisotropic exchange interactions), ordering of magnetic moments (ferromagnetism, antiferromagnetism, ferrimagnetism, helimagnetism and spin glasses), magnetic domains and Bloch walls (domain formation, magnetization processes, observation of magnetic domains), single-domain magnetic structures (qualitative and quantitative description, Stoner-Wohlfarth model), superparamagnetism, surface and finite size effects, non-interacting and interacting systems of particles (qualitative and quantitative description, Chantrell model, Dormann-Bessais-Fiorani model, Morup model, etc.), spin canting, quantum phase transitions, thin films and multilayer systems, magnetoresistance (anisotropic, exchange and colossal magnetoresistance, quantum Hall effect). 2. "Candidates" of nanostructures - Iron oxides and perovskites. 3. Frustration and spin glasses - topographic and magnetic frustration, qualitative description, conditions for frustrations, spin glasses (randomness of magnetic interactions, amorphous magnets, detection of spin glasses). 4. Magnetooptical phenomena in nanostructures - Faraday effect, Kerr effect. 5. Spintronics - basics of spintronics, suitable materials for spintronic devices, their manufacturing and characterization, injection of spins, transfer of spins, spin polarization, magnetoelectrical devices.
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Learning activities and teaching methods
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Monologic Lecture(Interpretation, Training)
- Homework for Teaching
- 20 hours per semester
- Preparation for the Course Credit
- 40 hours per semester
- Attendace
- 26 hours per semester
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Learning outcomes
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The aim of the lecture is to transfer to the students the current knowledge concening magnetism in solids, and familiarize the students with magnetic phenomena occurring in the nanoworld and application potential of magnetic nanostructures.
Define basic terms in the field of magnetism of solids, describe main approaches when studying magnetic properties of systems in the nanoworld, demonstrate the understanding of various issues and apply the acquired knowledge for solution of model problems.
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Prerequisites
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unspecified
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Assessment methods and criteria
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Oral exam
Class attendance. Knowledge of the course topics, ability to discuss about the course topics in wider contexts.
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Recommended literature
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zápisy z přednášek.
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Awschalom, D. D.; Buhrman, R. A.; Daughton, J. M.; von Molnar, S.; Roukes, M. L. (2004). Spin Electronics. Kluwer Academic Publisher, Dordrecht.
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Blundell, S. (2003). Magnetism in Condensed Matter. Oxford University Press.
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Borisenko, V.E., Ossicini, S. (2004). What is What in the Nanoworld. A Handbook of Nanoscience and Nanotechnology. Wiley-VCh, Verlag GmbH & Co. KGaA, Weinhein.
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Craik, D. J. (1995). Magnetism: Principles and Applications. Wiley.
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Dormann, J. L.; Fiorani, D., Tronc, E. (1997). Magnetic Relaxation in Fine-Particle Systems. in Advances in Chemical Physics, edited by I. Prigogine and S. A. Rice, Wiley, vol. 98, p. 283.
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Jiles, D. (1997). Introduction to Magnetism and Magnetic Materials, Second Edition. Chapman & Hall, London.
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Mydosh, J. A. (1993). Spin Glasses: An Experimental Introduction. Taylor & Francis, London.
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O'Handley, R. C. (1999). Modern Magnetic Materials: Principles and Applications. John Wiley & Sons, New York.
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Poole, Ch.P., Owens, F.J. (2003). Introduction to Nanotechnology. John Wiley & Sons, New Jersey.
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