Download e-book for kindle: Advances in magnetic materials : processing, properties, and by Zhang, Sam; Zhao, Dongliang


By Zhang, Sam; Zhao, Dongliang

ISBN-10: 1498706711

ISBN-13: 9781498706711

Advances in Magnetic fabrics: Processing, homes, and function discusses contemporary advancements of magnetic fabrics, together with fabrication, characterization and purposes within the aerospace, biomedical, and semiconductors industries. With contributions by means of foreign pros who own large and sundry services, this quantity encompasses either bulk fabrics and skinny motion pictures and coatings for magnetic purposes. A well timed reference ebook that describes things like ferromagnetism, nanomaterials, and Fe, ZnO, and Co-based fabrics, Advances in Magnetic fabrics is an amazing textual content for college kids, researchers, and execs operating in fabrics technology.

  • Describes contemporary advancements of magnetic fabrics, together with fabrication, characterization, and applications
  • Addresses quite a few commercial purposes, reminiscent of aerospace, biomedical, and semiconductors
  • Discusses bulk fabrics and skinny movies and coatings
  • Covers ferromagnetism, nanomaterials, Fe, ZnO, and Co-based materials
  • Contains the contributions of overseas execs with large and sundry expertise
  • Covers a holistic variety of magnetic fabrics in quite a few elements of strategy, homes, and function

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Additional info for Advances in magnetic materials : processing, properties, and performance

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The unique magnetic properties are usually inherent in the particles with a core size of 2–30 nm. For most magnetic nanoparticles, this value coincides in the order of magnitude with the theoretical estimate for the smallest dimensions of a magnetic domain. The soft magnetic core provides a high saturation magnetization and the relative hard magnetic shell ensures a high coercive force. 13 show a typical example of core-shell magnetic nanoparticles, where the soft magnetic core provides a high saturation magnetization and the relative hard magnetic shell ensures a high coercive force.

This is the phenomenon known as superparamagnetism. There is a characteristic acquisition time tc associated with each measurement technique. For example, tc ≈ 1 s for magnetization measurements, and tc ≈ 10 − 8 s for Mössbauer spectroscopy. For an intermediate value of τ, the particle is superparamagnetic as far as magnetization measurements are concerned, but blocked for Mössbauer spectroscopy. 38) The superparamagnetism phenomenon characterizes objects of very small dimensions. As far as magnetization measurements are concerned, the blocking temperature of a 3 nm cobalt nanoparticle is of the order of 30 K, but it approaches room temperature for a diameter of 6 nm.

The domains align with the field, and retain a good deal of that alignment when the field is removed, resulting in a magnet. An electromagnet, in contrast, uses soft iron. This allows the field to be turned on and off. One method is to coil a wire around a nail (made of iron or steel) and connect the two ends of the wire to a battery. When the domains in the nail align with the field produced by the current, the magnetic field is magnified by a large factor, typically by 100–1000s. 2 Paramagnetism There are unpaired electrons in paramagnetic material, that is, atomic or molecular orbital with exactly one electron in them [78].

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Advances in magnetic materials : processing, properties, and performance by Zhang, Sam; Zhao, Dongliang

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