Month: March 2011

Magnetic Materials

Ferrites

Ferrimagnetic materials commonly known as ferrites, can be generally represented by chemical formula XOFe2O3, where X stands for Mn, Co, Ni, Cu, Mg, Zn, Cd

Magnetic Materials

Applications of ferrites

Ferrites have following applications: Ferrites have importance in engineering and technology because they possess spontaneous magnetic moment below the Curie temperature just as iron, cobalt,

Magnetic Materials

Hard magnetic materials

Hard magnetic materials are those which have high coercivity, high retentivity and low loss in magnetisation due to mechanical treatment and no effect of temperature.

Magnetic Materials

Induced anisotropy

In case of polycrystalline solids, the various crystals in a polycrystals are randomly oriented, so that properties are same in all directions. However if specific

Magnetic Materials

Magnetic Anisotropy

Magnetic anisotropy is that property due to which ferromagnets tend to magnetize along certain crystallographic axes, called directions of easy magnetization. Example: In certain single

Magnetic Materials

villari effect

Magnetostriction is a reversible effect because change in magnetsation can be produced by applying stress on the material. This effect is called Villari effect. Reference:

Magnetic Materials

Magnetostriction

When a ferromagnetic material is magnetised, its length either expands or contracts in the direction of the magnetisation. This effect is called magnetostriction or Joule

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