Saturday 6 April 2013

Magnetic and Dielectric properties of Solids


Magnetic Property Of Solids
Alignment
DiamagneticWeakly repelled by external
magnetic field
NaCl, KCI etc.
ParamagneticWeakly attracted by magnetic fieldO2, Cu2+, Fe3+
FerromagneticPermanent alignment of magnetic
moment
Fe, Ni, Co, CrO2
FerrimagneticUnequal number of alignmentsFe3O4
Antiferro MagneticCompensatory wavy formMnO

 
Dielectric Property

Piezeoelectricity
Production of electricity on
applying mechanical stress
BaTiO3, KH2PO4, PbZrO4
FerroelectricityDielectric dipoles are permanently
aligned
BaTiO3, KH2PO4
AntiferroelectricityDielectric dipoles, are arranged in
a compensatory wavy form
PbZrO3
PyroelectricProduction of electricity on heating
a dielectric substance
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