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Solid State Physics
What are ferroelectric materials? Explain with the example of BaTiO3. How are they
different from piezoelectric materials?
different from piezoelectric materials?
Solid State Physics
What are transducers? Explain the working principle of a peizielectric transducer.
Solid State Physics
Explain the three types of defects in crystals.
Solid State Physics
Calculate the magnetic moment of Co Fe O4.
3
2
2+ +
3
2
2+ +
Solid State Physics
Calculate the limiting value of the magnetic field for which Nb will act as a
superconductor at 4 K. Take Bac(0) as 1970 Oe and Tc for Nb to be 9.25 K.
superconductor at 4 K. Take Bac(0) as 1970 Oe and Tc for Nb to be 9.25 K.
Solid State Physics
Calculate the intrinsic carrier concentration for GaAs at 300 K, given that,
* 0.56 ; * 0.068 and 1.42
mh = me me = me Eg = eV.
* 0.56 ; * 0.068 and 1.42
mh = me me = me Eg = eV.
Solid State Physics
Show that for a square lattice in two dimensions the kinetic energy of a free electron at a
corner of the first Brillouin zone is higher than that of an electron at the midpoint of a
side face of the zone by a factor of 2.
corner of the first Brillouin zone is higher than that of an electron at the midpoint of a
side face of the zone by a factor of 2.
Solid State Physics
Aluminium has three valence electrons per atom, an atomic weight of 0.02698 kg mol−1,
a density of 2700kgm-3, and a conductivity of 3.54× 107 W−1m−1. Calculate the relaxation
time in Aluminium.
a density of 2700kgm-3, and a conductivity of 3.54× 107 W−1m−1. Calculate the relaxation
time in Aluminium.
Solid State Physics
Derive an expression for the velocity of the transverse wave in the [100] direction in a
cubic crystal.
cubic crystal.
Solid State Physics
The Debye temperature for silver is 225 K. Calculate the highest possible frequency for
lattice vibrations in silver and its molar heat capacity at 10 K and 500 K.
lattice vibrations in silver and its molar heat capacity at 10 K and 500 K.
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