MOKE magnetometer
An evico magnetics wide-field Kerr microscope serves as a MOKE magnetometer at the same time. By plotting the Kerr intensity of a freely selectable image spot as a function of magnetic field immediately leads to a (local) MOKE magnetization curve. The magnetic domains responsible for the loop are simultaneously mapped and recorded along the curve, allowing a very convenient and reliable interpretation of the hysteresis curve. MOKE magnetometry can be applied with in-plane and polar Kerr sensitivities and magnetic field axes. Interfering Faraday rotations in the objective lens, which may lead to distorted MOKE loops, can be eliminated.
Post-treatment
Our software package also includes a “looper offline” program that significantly speeds up magnetometry experiments. Once a MOKE loop has been measured and recorded along with the domain images along the loop, the Looper Offline program can be used to draw new loops at selected sample regions. The software can also be used to create high-quality, low-noise movies of the magnetization process.
The further information on the use of wide-field Kerr microscope as a magnetometer can be found in the following papers (also aviabale in Relevant technical publications as preprints):
Selective sensitivity in Kerr microscopy (I. V. Soldatov and R. Schäfer, Rev. Sci. Instrum. 88, 073701 (2017))
Advanced MOKE magnetometry in wide-field Kerr-microscopy (. V. Soldatov and R. Schäfer, J. Appl. Phys. 122, 153906 (2017))