Nickel shows ferromagnetic property at room t | vedclass

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(A) Nickel exhibits ferromagnetism due to a quantum physical effect known as exchange coupling,where the electron spins of one atom interact with thos

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paramagnetism

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(A) Nickel exhibits ferromagnetism due to a quantum physical effect known as exchange coupling,where the electron spins of one atom interact with those of neighboring atoms.This interaction results in the alignment of the magnetic dipole moments of the atoms,overcoming the randomizing tendency of thermal collisions.This persistent alignment is responsible for the permanent magnetism in ferromagnetic materials.When the temperature of a ferromagnetic material is raised above a specific critical value,known as the Curie temperature $(T_C)$,the exchange coupling is no longer effective.Consequently,the material transitions from being ferromagnetic to paramagnetic.In the paramagnetic state,the dipoles still tend to align with an external magnetic field,but this alignment is much weaker,and thermal agitation can easily disrupt it.

Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature,then it will show

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