The magneto-optical Kerr effect (MOKE) uses polarised light to probe the magnetic properties of materials. The MOKE system at NPL has a field of view of a few mm down to a resolution of 200 nm and allows the study of the surface magnetisation of a wide range of samples, with both in-plane and out-of-plane fields. We can examine thin films, magnetic devices, and bulk materials to understand domain structure of magnetic materials, study quantum spintronic materials and devices and provide confidence in product development. This technique is useful for magnetic memories, magnetic sensors, radio-frequency and microwave devices, logic and non-Boolean devices.
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