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Moreover, cobalt ferrite's magnetostrictive properties can be tuned by inducing a magnetic uniaxial anisotropy. [26] This can be done by magnetic annealing, [27] magnetic field assisted compaction, [28] or reaction under uniaxial pressure. [29] This last solution has the advantage to be ultra fast (20 min) thanks to the use of spark plasma ...
Below 912 °C (1,674 °F), iron has a body-centered cubic (bcc) crystal structure and is known as α-iron or ferrite.It is thermodynamically stable and a fairly soft metal. α-Fe can be subjected to pressures up to ca. 15 GPa before transforming into a high-pressure form termed ε-Fe discussed below.
Cobalt ferrite is a semi-hard ferrite with the chemical formula of CoFe 2 O 4 (CoO·Fe 2 O 3). The substance can be considered as between soft and hard magnetic material and is usually classified as a semi-hard material.
This directional property is used in the construction of microwave devices like isolators, circulators, and gyrators. Ferrimagnetic materials are also used to produce optical isolators and circulators. Ferrimagnetic minerals in various rock types are used to study ancient geomagnetic properties of Earth and other planets.
Ferrite may refer to: Ferrite (iron) , one of the allotropes of iron that is stable at room temperature and pressure, α-Fe Ferrite (magnet) , a ferromagnetic ceramic material
Several ferrite cores. In electronics, a ferrite core is a type of magnetic core made of ferrite on which the windings of electric transformers and other wound components such as inductors are formed. It is used for its properties of high magnetic permeability coupled with low electrical conductivity (which helps prevent eddy currents).
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Barium ferrite is a common material for speaker magnets. The materials can be formed into almost any shape and size using a process called sintering, whereby powdered barium ferrite is pressed into a mold, and then heated until it fuses together. The barium ferrite turns into a solid block while still retaining its magnetic properties.