Electronic and spintronic devices articles from across Nature Portfolio

Previous demonstrations of electrically and optically detected magnetic resonance in OLED materials have established these systems as promising candidates for magnetic field sensing. Here the authors present an integrated OLED-based device for magnetic field imaging with sub-micron resolution.

Spin-hall nano-oscillators have potential for use in neuromorphic computing applications. Normally they are based around combination platinum and permalloy. Here, the authors combine a permalloy ferromagnet with a low magnetic damping ferrimagnet, leading to significantly improved performance.

Quantum sensors based on NV centers in diamond are well established, however the sensitivity of detection of high-frequency radio signals has been limited. Here the authors use nanoscale field-focusing to enhance sensitivity and demonstrate ranging for GHz radio signals in an interferometer set-up.

Zhang and colleagues report an orbital angular momentum detection device for vortex microwave photons. Specifically, the device is able to distinguish the intrinsic orbital angular momentum mode of the vortex microwave photons with the diffraction pattern of the coupled vortex electrons at room temperature, occupying a much smaller area compared to a particle accelerator system. The device enables application of microwave photons in practical scenarios.

Implementing MEMS resonators calls for detailed microscopic understanding of the devices and imperfections from microfabrication. Lee et al. imaged super-high-frequency acoustic resonators with a spatial resolution of 100 nm and a displacement sensitivity of 10 fm/√Hz. Individual overtones, spurious modes, and acoustic leakage are also visualized and analyzed.