Para Magnetism
Paramagnetism refers to a property of materials that are weakly attracted to a magnetic field. When exposed to a magnetic field, internal induced magnetic fields form in the material that are ordered in the same direction as the applied filed. Once the applied field is removed, the material loses its magnetism as thermal motion randomizes the electron spin orientation.
It is a kind of magnetism where several objects are attracted through an externally applied magnetic field. Whereas the diamagnetic materials are repelled by magnetic fields and develop induced magnetic fields in the direction which is opposite to that of the applied magnetic fields.
The paramagnetic material becomes good magnetic material when placed in the strong magnetic material. It acts as a magnet which attracts and repel other magnetic and ferromagnetic materials. When the magnetic field is removes, the total magnetic alignment of the magnetic dipoles is lost and the dipole returned to their normal random motion. This condition is known as Paramagentism.
The Super Paramagnetism is described as the property as some materials magnetic moments change their direction at the nanoscale and behaves like a paramagnet event. According to Curie law, if there is no magnetic field applied, Curie temperature is applied at the same time as they show high magnetic susceptibility.
Curie’s Law: According to Curie’s law, the magnetization in the paramagnetic material is inversely proportional to the temperature which means the more the temperature of the paramagnetic material increases, its magnetization decreases.
\(M\,\,=\,\,\frac{C}{BT}\).
Where,
C = Curie constant,
T = Temperature in Kelvin and,
B = Applied the magnetic field.