Nitrogen-Vacancy (NV) centers in diamond, exhibiting unique optical and quantum spin properties, can be used as sensitive magnetometers with high spatial resolution, specifically in integrated solid-state devices.

In recent years, there has been increasing interest in using chiral molecules as spin filters and effective nano-magnets, in the context of various applications, e.g. spintronics, magnetic memories and quantum information processing. However, the exact nature and mechanisms underlying these effects are still unknown.

In this work we fabricated an integrated device, comprising of an NV-containing diamond substrate as a sensitive, localized magnetic sensor, together with a thin ferro magnetic layered topped by spatially structured chiral molecule domains. We are employing the NV sensors for studying the properties of the magnetized layer, characterizing domain size and dynamics, magnetization diffusion and magnetic field decay. This unique, local and sensitive approach could lead to new insights on chiral-induced proximity effects, advancing the state-of-the-art in understanding the physics of these phenomena, and opening new possibilities for integrated spintronics and quantum information devices.