magnetic spinel

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• Magnetic nanoparticles — are a class of nanoparticle which can be manipulated using magnetic field. Such particles commonly consist of magnetic elements such as iron, nickel and cobalt and their chemical compounds. While nanoparticles are smaller than 1 micrometer in… …   Wikipedia

• Magnetic mineralogy — is the study of the magnetic properties of minerals. The contribution of a mineral to the total magnetism of a rock depends strongly on the type of magnetic order or disorder. Magnetically disordered minerals (diamagnets and paramagnets)… …   Wikipedia

• magnetic ceramics — Introduction       oxide materials that exhibit a certain type of permanent magnetization called ferrimagnetism. Commercially prepared magnetic ceramics are used in a variety of permanent magnet, transformer, telecommunications, and information… …   Universalium

• Magnetite — Not to be confused with Magnesite or Maghemite. Magnetite Magnetite and pyrite from Piedmont Italy …   Wikipedia

• magnet — /mag nit/, n. 1. a body, as a piece of iron or steel, that possesses the property of attracting certain substances, as iron. 2. a lodestone. 3. a thing or person that attracts: The park was a magnet for pickpockets and muggers. [1400 50; late ME… …   Universalium

• Ferrite (magnet) — For other uses, see Ferrite (disambiguation). A stack of ferrite magnets Ferrites are chemical compounds consisting of ceramic materials with iron(III) oxide (Fe2O3) as their principal component.[1] Many of them are magnetic materials and t …   Wikipedia

• Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

• ferrite — /fer uyt/, n. 1. Chem. a compound, as NaFeO2, formed when ferric oxide is combined with a more basic metallic oxide. 2. Metall. the pure iron constituent of ferrous metals, as distinguished from the iron carbides. [1875 80; < L ferr(um) iron +… …   Universalium

• Abiogenic petroleum origin — is a largely abandoned hypothesis that was proposed as an alternative to theory of biological petroleum origin. It was relatively popular in the past, but it went largely forgotten at the end of the 20th century after it failed to predict the… …   Wikipedia

• Garnet — For other uses, see Garnet (disambiguation). Garnet General Category Nesosilicate Chemical …   Wikipedia

• magnetite — /mag ni tuyt /, n. a very common black iron oxide mineral, Fe3O4, that is strongly attracted by magnets: an important iron ore. [1850 55; MAGNET + ITE1; cf. G Magnetit] * * * or lodestone or magnetic iron ore Iron oxide mineral (Fe3O4), the chief …   Universalium