Room‐Temperature Magnetoelectric Coupling in Strontium Titanate

at room-temperature in strontium titanate by dedicated vacancy engineering. The asymmetric distribution of oxygen vacancies surrounding titanium vacancies enables atomic displacement of titanium and charge injection, providing joint origin for ferroelectricity and ferromagnetism, as confirmed by atomic-scale structural analysis and first-principles calculations. The mechanism of ME coupling is offered as the hopping of oxygen vacancies under electric fields, which leads to the rearrangement of electronic configuration. This work establishes a novel design paradigm for high-performance room-temperature single-phase multiferroic materials, with particular relevance to perovskite oxide systems.