Burst eddy current testing with diamond magnetometry

In this work, a burst eddy current testing technique based on the employment of diamond nitrogen vacancy (NV) center magnetometer with Hahn echo (HE) sequence is demonstrated. With confocal experiment apparatus, HE-based NV attains magnetic sensitivity [Formula: see text] and volume-normalized text], which are ∼five times better than already existing method under same conditions. Based proposed configuration, prototype achieves minimum detectable sample smaller spatial resolution employed to image different metallic specimens detect layered internal structures. Since comprises remarkable high sensitivity, it exhibits various potential applications in fields security screening quality control. Moreover, its biocompatibility promising nanoscale pave way for electromagnetic biomaterials.