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

By Zhang, Sam; Zhao, Dongliang

Advances in Magnetic fabrics: Processing, homes, and function discusses contemporary advancements of magnetic fabrics, together with fabrication, characterization and functions within the aerospace, biomedical, and semiconductors industries. With contributions through overseas pros who own wide and sundry services, this quantity encompasses either bulk fabrics and skinny motion pictures and coatings for magnetic purposes. A well timed reference publication that describes things like ferromagnetism, nanomaterials, and Fe, ZnO, and Co-based fabrics, Advances in Magnetic fabrics is an awesome 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 numerous commercial purposes, similar to aerospace, biomedical, and semiconductors
  • Discusses bulk fabrics and skinny motion pictures and coatings
  • Covers ferromagnetism, nanomaterials, Fe, ZnO, and Co-based materials
  • Contains the contributions of overseas pros with extensive and sundry expertise
  • Covers a holistic variety of magnetic fabrics in numerous elements of strategy, houses, and function

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

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3 Core-Shell Nanoparticles The metallic core of magnetic nanoparticles may be passivated by gentle oxidation, surfactants, polymers, and precious metals [51]. In oxygen-rich environment, Co nanoparticles form an antiferromagnetic CoO layer on the surface of the Co nanoparticle. Recently, research has explored the synthesis and exchange bias effect in these Co–CoO core-shell nanoparticles with a gold outer shell [74]. In general, nanoparticles with a magnetic core consisting either of elementary iron or cobalt with a nonreactive shell made of graphene offers enhanced magnetic properties compared to ferrite or elemental nanoparticles in terms of: • Higher magnetization • Higher stability in acidic and basic solution as well as organic solvents • Chemistry on the graphene surface via methods already known for carbon nanotubes [75–77] In addition, core-shell nanoparticles may also form external functional groups.

5 nm have been prepared by thermal decomposition of Fe2(C2O4)3 ⋅ 5H2O at T > 400°C [35]. The controlled reduction of ultradispersed α −Fe2O3 in a hydrogen stream at 723 K (15 min) is a more reliable method of synthesis of Fe3O4 nanoparticles with particle size in the range of 13 nm and were prepared in this way [36]. FeO (wustite) is antiferromagnetic (TC = 185 K) in the bulk state and mainly prepared by comilling of Fe and Fe2O3 powders in a definite ratio which gave nanoparticles (5–10 nm) consisting of FeO and Fe [37].

This effect systematically increases the orbital magnetic moments that were aligned opposite the field, and decreases the ones aligned parallel to the field. This results in a small bulk magnetic moment, with an opposite direction to the applied field. Note that all materials undergo this orbital response. However, in paramagnetic and ferromagnetic substances, the diamagnetic effect is overwhelmed by much stronger effects caused by the unpaired electrons. There are various other types of magnetism, such as spin glass, superparamagnetism, superdiamagnetism, and metamagnetism.

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