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b) Ferroelectric
Explanation: Curie-Weiss law is given by χe = εr -1 = C/(T-θ), where C is the curie
constant and θ is the characteristic temperature which is usually a few degrees higher
than the curie temperature for ferromagnetic materials.
b
Explanation: Curie-Weiss law is given by χe = εr -1 = C/(T-θ), where C is the curie
constant and θ is the characteristic temperature which is usually a few degrees higher
than the curie temperature for ferromagnetic materials.
The Curie-Weiss law is applicable to ferromagnetic and antiferromagnetic materials near their Curie temperature for ferromagnets or Néel temperature for antiferromagnets. This law describes how the susceptibility (χ) of a ferromagnet or antiferromagnet changes with temperature (T). Specifically, the Curie-Weiss law is presented mathematically as:
[ chi = frac{C}{T – T_c} ]
where:
– (chi) is the magnetic susceptibility,
– (C) is the Curie-Weiss constant,
– (T) is the absolute temperature,
– (T_c) is the Curie temperature for ferromagnets or the Néel temperature for antiferromagnets.
This law is valid above the Curie or Néel temperature, where these materials undergo a phase transition from a ferromagnetic or antiferromagnetic ordered state to a paramagnetic disordered state.