Lecture Electromechanical energy conversion - Magnetic circuits and magnetic materials presents the following content: Introduction to magnetic circuits; flux linkage, inductance, and energy; properties of magnetic materials; AC excitation; permanent magnets; application of permanent magnet materials.
Investigation of the magnetic properties of materials is very important,
because magnetic phenomena have various scientific and technical
The macroscopic properties of matter are a manifestation of the
microscopic properties of the atoms of which it is composed.
The magnetic properties of materials may be very different for types of
material, depending on their nature and structure.
The idea of writing a book on neutron scattering from magnetic materials occurred to me
about four years ago. I was then acting as a subeditor of the topic Neutron Scattering for
the encyclopedic book “Scattering: Scattering and Inverse Scattering in Pure and Applied
Science” which was to be published by Academic Press, London . There I had to cover
the field of neutron scattering in a very limited space and that was a very difficult and
frustrating task indeed. I
Normally, any ferromagnetic or ferrimagnetic material undergoes a transition to a paramagnetic state above its Curie temperature. Superparamagnetism is different from this standard transition since it occurs below the Curie temperature of the material.
Superparamagnetism occurs in nanoparticles which are single domain. This is possible when their diameter is below 3–50 nm, depending on the materials.
Electric motors convert electrical energy into mechanical energy by utilizing the
properties of electromagnetic energy conversion. The different types of motors
operate in different ways and have different methods of calculating the performance,
but all utilize some arrangement of magnetic fields. Understanding the concepts
of electromagnetics and the systems of units that are employed is essential to
understanding electric motor operation.The first part of this chapter covers the concepts
and units and shows how forces are developed.
Recent progress in information technology, wireless communication, biotechnology
and microelectronics requires advanced technologies and new magnetic materials to
meet demands of modern devices. This collection of eight chapters provides an up‐todate
review of recent trends and developments in technology, characterization
methods, theory and applications of modern magnetic materials with original, never
published contributions from the renowned scientists in the field of magnetism.