Four pole electromagnet for in situ magneto-optical measurements

摘要

A Kerr magnetometer using a four pole electromagnet is described which allows the measurement of the Kerr rotation and ellipticity of a magnetic sample in both polar and longitudinal geometries without changing the optical path or the sampleposition. A maximum field of 4 kOe can be applied in any direction of the plane of the incident light. A continuous recording of the magnetization curves is possible during the growth of ultrathin metallic layers on a substrate in an ultra high vacuumsystem.