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Below a certain temperature, these magnets present permanent magnetic phases produced by randomly located magnetic moments. [1] Three common types of amorphous magnetic phases are asperomagnetism, speromagnetism and sperimagnetism, which correspond to ferromagnetism, antiferromagnetism and ferrimagnetism, respectively, of crystalline solids.
Melt spinning is used to manufacture thin metal sheets or ribbons that are near amorphous or non-crystalline. The unique resulting electric and magnetic properties of melt-spun metals are a consequence of this structure as well as the composition of the alloy or metal that was used to form the ribbon.
An amorphous metal (also known as metallic glass, glassy metal, or shiny metal) is a solid metallic material, usually an alloy, with disordered atomic-scale structure. Most metals are crystalline in their solid state, which means they have a highly ordered arrangement of atoms. Amorphous metals are non-crystalline, and have a glass-like structure.
Much-studied examples include amorphous materials, glasses, and dilute magnets. The term frustration, in the context of magnetic systems, has been introduced by Gerard Toulouse in 1977. [1] [2] Frustrated magnetic systems had been studied even before.
The term "glass" comes from an analogy between the magnetic disorder in a spin glass and the positional disorder of a conventional, chemical glass, e.g., a window glass. In window glass or any amorphous solid the atomic bond structure is highly irregular; in contrast, a crystal has a uniform pattern of atomic bonds
GMI is caused by the penetration length that is a measure of how deep an ac electrical current can flow inside an electrical conductor.The penetration length (also known as the skin-depth effect) increases with the square root of the electrical resistivity of the material and is inversely proportional to the square root of the product of the magnetic permeability and the frequency of the ac ...
Michael Coey got a BA in Physics at Jesus College, Cambridge (1966), and a PhD from University of Manitoba (1971) for a thesis on "Mössbauer Effect of 57 Fe in Magnetic Oxides" with advisor Allan H. Morrish.
An amorphous metal transformer (AMT) is a type of energy efficient transformer found on electric grids. [1] The magnetic core of this transformer is made with a ferromagnetic amorphous metal . The typical material ( Metglas ) is an alloy of iron with boron , silicon , and phosphorus in the form of thin (e.g. 25 μm) foils rapidly cooled from melt.
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