Question

Distinguish between Para, Ferro and Diamagnetism.

Answer 1

Basic properties of paramagnetic substance ferromagnetic and diamagnetic, like in presence of magnetic field, susceptibility and others.

Complete step by step answer:
The distinction between Ferro, para and diamagnetism is as given below

Property	Diamagnetism	Paramagnetism	Ferromagnetism
Effect of magnets	They are weakly repelled by magnets	They are weakly attracted by magnets	They are strongly attracted by magnets
Susceptibility	Small and negative i.e. $- 1 \leqslant {X_m} < 0$	Small and positive i.e. $0 < {x_m} < E$where E is a small number	Very large and positive ${X_m} > 1000$
Hysteresis effect	Magnetic vectors show no hysteresis.	Magnetic vector shows no hysteresis	Magnetic vector shows hysteresis
In external magnetic field	It acquires weak magnetisation in the opposite direction to the magnetising field.	It acquires weak magnetisation in the direction of the magnetising field.	It acquires strong magnetisation in the direction of the magnetising field.
In non-uniform magnetic field	It tends to move slowly from the stronger to the weaker parts of the field.	It tends to move slowly from weak to the stronger parts of the field.	It tends to move quickly from weaker to stronger pails of the field.
Effect of temperature	Susceptibility is independent of temperature	Susceptibility varies inversely astemperature ${x_m}\alpha \dfrac{1}{T}$	Susceptibility decreases with temperature in a complex manner${x_x}\alpha \dfrac{1}{T}\left( {T > {T_c}} \right)$
Removal of magnetising field	Magnetisation lasts as long as the magnetic field is applied	As soon as the field is room, its magnetisation is lost	In it, magnetisation is retained even after the removal of the magnetising field

Note: Remember that diamagnetism arises in a paired electron system which thus results in net zero magnetic moment. While paramagnetism is generally due to unpaired electrons and their domains try to align them in the direction of field applied.