Study of Static and Dynamical Properties of Topological Magnetic Vortices with Spin Center in hBN

Eudes Gomes da Silva

Abstract: Solid-state spin centers are powerful building blocks for quantum technologies like sensors and qubits. Recently, coupling these spin centers with magnetic systems has opened new ways to control quantum states and connect distant qubits. However, combining spin centers with topological magnetic structures—such as magnetic vortices—remains largely unexplored.

In this talk, we present new theoretical and experimental results on coupling spin centers in hexagonal boron nitride (hBN) with topological magnetic vortices in a NiFe thin film. To map magnetic fields, we use optically detected magnetic resonance (ODMR) to measure the static stray fields of a magnetic vortex, validating our results with micromagnetic and quantum simulations. Furthermore, by sensing vortex dynamics through the application of microwave fields, we drive the gyration mode of the vortex core. This generates high-frequency dynamical fields that resonate with the spin centers, producing a distinct optical response above a specific power threshold.

Our findings demonstrate that spin centers can successfully map and study complex topological magnetic dynamics, opening doors for advanced hybrid quantum devices.