Advanced magneto-optical Kerr effect measurements of superconductors at low temperatures

Magneto-Optical Kerr measurements in High Magnetic fields and at Low Temperatures

A unique apparatus to measure the magneto-optical (MO) properties of ultra thin magnetic films and multilayers at high fields (20 Tesla) and low temperatures (2-325 Kelvin) was developed. The realized equipment has a sensitivity in the sub-mdegree range (10-8 10-9 emu for iron), and can be used to measure the MO properties in reflection and transmission mode. It has been added to the user acces...

Polar magneto-optical Kerr effect for low-symmetric ferromagnets

Enhancement of the Magneto-Optical Kerr Effect in One- Dimensional Magnetophotonic Crystals with Adjustable Spatial Configuration

We studied magnetophotonic crystals (MPCs) with introduced magneticdefect layer sandwiched between magnetic and dielectric Bragg mirrors. Thesemagnetophotonic crystals have excellent capabilities to enhance reflection and Kerrrotation simultaneously. By adjusting spatial configuration such as repetition numbersof Bragg mirrors and thickness of magnetic defect layer, we a...

A mirror based polar magneto-optical Kerr effect spectroscopy arrangement.

An arrangement is described for performing magneto-optical Kerr effect (MOKE) spectroscopy in polar geometry with a conventional C-frame or H-frame type electromagnet. It uses an additional mirror which eliminates the need for an electromagnet pole piece with an axial hole and allows for easy switching between polar MOKE geometry and longitudinal or transverse MOKE geometries. A theoretical ana...

Magnetic Hysteresis Modelling Based on Magneto-optical Kerr Effect

The paper presents an identification method of the numerical Preisach hysteresis model, based on the digital acquisition and processing of the magnetic microstructure images, which are obtained by time-resolved magneto-optical microscopy. The statistic Preisach function is computed by the superposition of all pixels, allowing to verify the basic assumptions of Preisach hysteresis model from the...