Room-temperature Energy-efficient Control of Magnetism in Multiferroic Heterostructure

Electrical tuning of magnetism is crucial for developing fast, compact, ultra-low power electronic devices, with multiferroics offering significant potential due to their ability to control magnetism through magneto electric coupling, particularly at layered high-quality interface. A key challenge is achieving reversible and stable switching between distinct magnetic states using a control voltage. In this work, we will present ferroelectric tuning of room-temperature magnetism in a multiferroic heterostructure. The energy-efficient control costs below 1 fJ energy per operation, leading to ~43 % change of magnetization. This tunable multiferroic interface and devices provide great opportunities for next-generation reconfigurable communication systems, spintronics, sensors and memories.