 This can be circumvented by varying the gradient field independently of the applied DC field so the torque and the Faraday Force contribution can be separated, and/or by designing a Faraday Force Magnetometer that prevents the sample from being rotated.Optical magnetometry makes use of various optical techniques to measure magnetization.One such technique, Kerr Magnetometry makes use of the magneto-optic Kerr effect, or MOKE.