Dear Mohd Alam this is the fact that I know:

The evolution of electronic transport under the influence of a magnetic field in normal metals can be understood by the behaviour of the transverse magnetoresistance ρxx(Hz), which evolves quadratically with a small magnetic field H [1], saturating at high fields if the hole and electron densities are not compensated.

The asymptotic behaviour in the low-field limit of ωcτ

Dear Mohd Alam,

As the ferromagnetic Materials can be aligned with a comparatively easy way along the direction of applied Magnetic field, when the electric current starts flowing through a ferromagnet , the Magnetic field generated due to the current will be in such a direction that the magnet dipoles will be aligned and create a Magnetic field which opposes the further increase in current.

Basically, that is nothing but a resistive effect against current. Means - Msgnetoresistance.

If there is anything wrong in my Discussion, dear colleagues, please rectify me.

Thanks and Regards

N Das

Dear Mohd Alam

The positive Magnetoresistance observed at high temperatures (T> Tc). Magnetoresistance can have positive behavior related to both magnetic and structural properties of the Feromagnetic materia

anti-weak localization due to magnetic ordering.