A very small, not very cold, magnetosensor

Any scientist knows the importance of taking data with a grain of salt. Here at the QO Lab, Beibei Li, George Brawley,  Hamish Greenall, Stefan Forstner and Warwick Bowen went a step further and developed a sensitive on-chip room-temperature magnetometer by embedding a grain of magnetorestrictive material in an optical cavity. Read on in Photonics Research.