A major application of ferro- and ferrimagnetic materials is in transformer and motor cores. Materials are...

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Mechanical Engineering

A major application of ferro- and ferrimagnetic materials is intransformer and motor cores. Materials are required that aremagnetically soft (high permeabilities â€“ they are magnetized easilyat low applied fields and a low coercive field) with largepower-handling capacity and low losses. Why cannot pure iron metalbe used in transformer cores?
Account for the magnetic behavior of the followingspinels:
(a) ZnFe2O4 is antiferromagnetic
(b) MgFe2O4 is ferrimagnetic and its magnetic moment increases withtemperature
c) MnFe2O4 is ferrimagnetic and its magnetic moment isindependent of temperature

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4.2 Ratings (525 Votes)

Zinc Ferrite ZnFe2O4 has magnetic properties different to most spin ferrites It has low ordering temperature and an antiferromagnetic ground state The compound has a normal spinal structure with the iron atom located at octahedral B site and the Zn atoms occupying tetrahedral See Answer

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