Measuring the magnetic properties of different layers in multilayer films

What is it about?

We show that a single magneto-optical reflection experiment can precisely measure the magnetic properties of different layers in multilayer films. To do this, we created and studied a set of special samples, with one ferromagnetic layer, a non-magnetic layer, and a second ferromagnetic layer. These samples have a specific preferred magnetic direction and a controllable strength of the magnetic interaction between the ferromagnetic layers through the non-magnetic layer. Using a technique called generalized magneto-optical ellipsometry, we measured the angles of magnetization in the two ferromagnetic layers separately, depending on the applied magnetic field. We confirmed our findings with a model, which supported even the surprising aspects of our results and demonstrated the accuracy and reliability of our layer-specific magnetic measurements.

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Photo by Tod S on Unsplash

Photo by Tod S on Unsplash

Why is it important?

This work represents a significant step forward in the precise measurement and understanding of magnetic properties in layered materials, opening up new possibilities for research and technological innovation