a) What is meant by the term polarization of a solid? Describe polarizability of atoms and molecules.
b) Derive expressions for electric and ionic polarizability of a dielectric material.
a) Describe the behavior of a dielectric material in an ac field.
b) Derive expression for the energy absorbed per second in a dielectric material when an ac field is applied.
a) What are various kinds of point defects? Describe each of them.
b) Derive expression for the concentration of valancies in metallic and ionic crystals.
a) Describe the role of dislocations in the crystal growth of a solid.
b) What is meant by the term magnetic susceptibility? describe experiments set up to measure the magnetic susceptibility of the material.
a) Differentiate between classical and quantum theory of Para magnetism.
b) Describe the quantum theory of Para magnetism. Obtain curies law for the paramagnetic material.
a) Describe the Weiss theory of ferromagnetism. Obtain an expression for the susceptibility of ferromagnetic material.
b) Describe how a saturation magnetization based on temperature.
a) Derive quantization condition of spin waves.
b) Obtain block T3/2 law. Describe its validity.
a) What do you mean by ferromagnetic material? Describe the structure of a ferrite material.
b) Describe Neer’s theory of ferromagnetic material.
problem 9: prepare note on any two of the given:
a) Effect of crystal field on the paramagnetic properties of solid.
b) Determination of dielectric of a solid.
c) GMR and CMR materials.
d) Ferromagnetic domains.