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"Soft" ferrites have low coercivity, so they easily change their magnetization and act as conductors of magnetic fields. They are used in the electronics industry to make efficient magnetic cores called ferrite cores for high-frequency inductors , transformers and antennas , and in various microwave components.
The most common soft ferrites are: Manganese-zinc ferrite (MnZn, with the formula Mn a Zn (1−a) Fe 2 O 4). MnZn have higher permeability and saturation levels than NiZn. Nickel-zinc ferrite (NiZn, with the formula Ni a Zn (1−a) Fe 2 O 4). NiZn ferrites exhibit higher resistivity than MnZn, and are therefore more suitable for frequencies ...
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.
"Soft" magnetic materials with low coercivity and hysteresis, such as silicon steel, or ferrite, are usually used in cores. Magnetic field ( green ) created by a current-carrying winding (red) in a typical magnetic core transformer or inductor, with the iron core C forming a closed loop, possibly with air gaps G in it.
It is mainly used for its magnetostrictive applications like sensors and actuators [2] thanks to its high saturation magnetostriction (~200 ppm). CoFe 2 O 4 has also the benefits to be rare-earth free, which makes it a good substitute for Terfenol-D. [3] Moreover, its magnetostrictive properties can be tuned by inducing a magnetic uniaxial ...
Hysteresis loop Induction B as function of field strength H for H varying between H min and H max; for ferromagnetic material the B has different values for H going up and down, therefore a plot of the function forms a loop instead of a curve joining two points; for perminvar type materials, the loop is a "rectangle" (Domain Structure of Perminvar Having a Rectangular Hysteresis Loop, Williams ...
The electric and magnetic properties of high quality epitaxial thin films of bismuth ferrite reported in 2003 [1] revived the scientific interest for bismuth ferrite. Epitaxial thin films have the great advantage that their properties can be tuned by processing [13] or chemical doping, [14] and that they can be integrated in electronic circuitry.
Zinc ferrites are a series of synthetic inorganic compounds of zinc and iron with the general formula of Zn x Fe 3−x O 4. Zinc ferrite compounds can be prepared by aging solutions of Zn(NO 3 ) 2 , Fe(NO 3 ) 3 , and triethanolamine in the presence and in the absence of hydrazine , [ 1 ] or reacting iron oxides and zinc oxide at high temperature.