Electrical Properties Of Magnesium Ferrites

The rare earth cations having their 4f orbital totally screened by 5s and 5p orbital and these play a key role in deciding the electrical and magnetic properties of ferrites.

Electrical properties of magnesium ferrites.

The soft magnetic behaviour in ferrites is caused by the exchange interaction among the cations on the polyhedral sites. Magnetic dielectric and electrical properties of lithium magnesium ferrites article pdf available in advanced chemistry letters 1 2 june 2013 with 269 reads how we measure reads. Reported the influence of ga 3 and la 3 in mg cu ferrites. In this work investigations have been carried out by the measurements of x ray diffraction xrd curie temperature permeability loss tangent q.

Magnetite fe 3 o 4 is a famous example like most of the other ceramics ferrites are hard brittle and poor conductors of electricity. Magnesium manganese ferrites are widely used in microwave devices due to their very high resistivity and low dielectric losses. The metamagnetic properties of the manganese magnesium ferrites having the general formula mn 0 7 mg 0 3 fe 2 o 4 prepared by the standard ceramic technique have been studied. Several investigators have studied the electrical properties of iron deficient and stoichiometric mg mn ferrites van uitert 2 8 observed high values of resistivity with the addition of small quantities of aluminium in iron deficient mg mn ferrites and.

Composition structure and properties. A series of polycrystalline spinel type ferrites with composition li x mg0 5ni0 5 2 x fe2 x o4 where x 0 00 to 0 25 in steps of 0 05 have been prepared by standard double sintering method sintered at temperature 1200 c in air for 6 hours. Substituting of mgfe 2 o 4 with one or several transition metals is one of the best method to enhance the properties of ferrites as studied with cr substitution. Many researchers reported the effect of various substituents on the dc electrical resistivity and dielectric properties of magnesium ferrites.

Substitution of magnesium ferrite with metal is the best technique to change or regulate the properties of ferrites. Many ferrites adopt the spinel structure with the formula ab 2 o 4 where a and b represent various metal cations usually including iron fe. It is proposed that when a change of temperature at adequate magnetic field is applied in a mn 0 7 mg 0 3 fe 2 o 4 a magnetic phase transition will be generated giving rise to an antiferromagnetic afm state. But a study of physical electrical and magnetic properties of cu cr doped magnesium ferrite using solid state methods is not yet reported.

Ferrites are usually ferrimagnetic ceramic compounds derived from iron oxides.