What is it about?

Just like x-ray scattering having been implemented to obtain crystal structure of different materials, we founded a way to use magnons (spin wave) to obtain magnetic property and other physical property of a material. This scattering platform is ideal to discovery physics related to material in the mesoscopic length scale.

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Why is it important?

This new scattering platform can be constructed on a one-person dining table, and it can be operated under conditions ranging from cryogenic to ambient environment. Hence, it’s very flexible and handy. Advancing this scattering technology further would allow a broad community to access physical property of a material that they are interested.

Perspectives

This publication describes a general scattering platform that uses magnons to explore the underlying properties of target materials. In this work we show how both phase and amplitude of magnons can be imaged using a nitrogen vacancy center magnetometer and how the scattered pattern of waves can be used to infer geometric and magnetic properties of a target material. To demonstrate this new experimental methodology we use a permalloy disk as our target and show that even with such a simple target unexpected behavior is observed. In addition, we provide a theoretical framework to reconstruct the properties of the target.

Tony Zhou
Massachusetts Institute of Technology

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This page is a summary of: A magnon scattering platform, Proceedings of the National Academy of Sciences, June 2021, Proceedings of the National Academy of Sciences, DOI: 10.1073/pnas.2019473118.
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