Название: Magneto-optics: An introduction Автор: Paul Fumagalli, Joachim Schoenes Издательство: De Gruyter Год: 2022 Страниц: 254 Язык: английский Формат: pdf (true), epub Размер: 13.1 MB
Magneto-optics (MO) is a wide field in physics and describes, in general, any interaction between electromagnetic radiation and a material which is magnetized. The book gives a concise but comprehensive introduction to theory, calculus, and typical experimental set-up used in magneto-optics. It includes a variety of practice problems with detailed solutions. The focus lies on the spectral range between near-infrared and near ultraviolet light because it is easily accessible in experiment using standard quartz optics.
The application of a magnetic field to induce a magnetization is in principle not necessary in case of the existence of spontaneous magnetization. The local magnetic field produced by the spontaneous magnetization will lead to similar MO effects as an external magnetic field. Nevertheless, a magnetic field is usually applied even in the case of spontaneous magnetization to avoid indeterminacies due to the formation of magnetic domains. If the area that is illuminated by the incoming light covers several magnetic domains, the MO effect measured is the average of the signal produced by the individual domains. By applying a magnetic field, the magnetic domains will be aligned. On the other hand, one can take advantage of this behavior when studying MO hysteresis curves.
MO effects are not limited to the energy range of visible light but exist in principle in the whole spectral range of electromagnetic waves: MO phenomena are known in the microwave as well as in the X-ray range and the DC limit relates to the Hall effect. In the microwave range, predominantly free carriers give a contribution. In X-ray range, transitions from inner shells to the conduction band are important. This is known as X-ray magnetic circular dichroism (XMCD) and, for example, has been successfully used for the proof of an induced magnetic moment in Co/Pt multilayers.
This book aims at graduate students. Knowledge of solid-state physics, quantum physics, and magnetism is advantageous but not a precondition. The content of the book is limited to the key aspects of magneto-optics. Therefore, magneto-optics of free carriers in doped semiconductors will only briefly be mentioned, although it has long been a focus area of magneto-optic research.
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Magneto-optics: An introduction 
Название: Magneto-optics: An introduction
