Imaging and Control of Magnonic Crystals Transmission Properties using Quantum Sensors

Abstract Magnonic crystals—artificial magnetic media with properties characterized by periodic lateral variation, are a prime candidate signal carriers for the processing of analog and digital information in next‐generation. However, the lack of universal in situ measurement techniques for the transmission properties of magnonic crystals in complicated environments makes it difficult to implement large‐scale magnon‐based computing. In this work, the in situ stray field of spin wave detection technique at different temperatures is developed with quantum sensors. The heating effect on the characteristic parameters of spin wave and the stray field intensity imaging of spin wave with different wavelengths across magnonic crystals are investigated and analyzed. The spin wave transmittance in magnonic crystals is successfully controlled by temperature, which means on demand reconfigurable magnonic crystals is realized. This work about imaging and control of magnonic crystals transmission properties constitutes a new way to study magnonic devices utilizing in situ quantum sensors and paves the way for the development of large‐scale magnonic circuits.