Can there be a material, which is non magnetic?

Which of the following material can be used for magnetic screening

How can you identify non-magnetic materials? Give an example of a non- magnetic material.

A magnetic material is placed in a non-uniform magnetic field which is orienteiong z-axis having then force gradient =(dH)/(dz) , experienced by the material will be equal to

A magnetic material is placed in a non-uniform magnetic field which is orienteiong z-axis having then force gradient =(dH)/(dz) , experienced by the material will be equal to