Question

Any one define the properties a material of diamagnetic

Answer 1

Diamagnetic materials are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in them in the opposite direction, causing a repulsive force. 

Magnetic susceptibility if diamagnetic materials is always negative.

In a diamagnetic material, the magnetic lines of forces due to an applied field are repelled.

Answer 2

Diamagnetic materials are often defined as substances which are lifted out of the magnetic field region. More precisely, the diamagnetic materials possess a negative value of magnetic susceptibility. Diamagnetic substances have no uncompensated spin or angular momenta so that their ground state is 1A (or 1B).