A redesigned crystal structure unlocks rare magnetic and electric behaviour, hinting at alternative computing approaches beyond traditional silicon-based energy limitations.
Researchers at Rice University have developed a modified multiferroic material that exhibits significantly enhanced performance at room temperature. Reported in Proceedings of the National Academy of Sciences, the work focuses on a reengineered version of bismuth ferrite created by combining it with barium titanate and growing it as a strained thin film.
The study addresses a long-standing limitation in multiferroics, where achieving strong ferroelectric and magnetic properties simultaneously at room temperature has been difficult. By tuning both chemical composition and lattice strain, the researchers were able to create a new structure with improved functional properties, marking a shift in how such materials can be designed.
Multiferroics are being studied for their ability to enable control of magnetic states using electric fields through magnetoelectric coupling. This property could support low-energy switching mechanisms in future computing systems, potentially reducing reliance on charge-based operations used in conventional silicon electronics. Such approaches are relevant in the context of rising energy demands from data-intensive workloads.
The engineered material demonstrates approximately 10 times higher magnetization and up to 100 times stronger magnetoelectric coupling compared to standard bismuth ferrite. Notably, the introduction of barium titanate, a nonmagnetic component, resulted in an increase in overall magnetism, an outcome that was not initially expected and required repeated validation.
The material was synthesized as a thin film using controlled deposition techniques, allowing precise manipulation of strain at the atomic level. Experimental validation was carried out through multiple iterations by Tae Yeon Kim, with additional support from external facilities and collaborators including Massachusetts Institute of Technology and the U.S. Naval Research Laboratory.
The work reflects a broader direction in materials research, where combining structural and chemical modifications is being used to unlock new functionalities. Such strategies could support the development of next-generation electronic and spintronic devices that operate with improved energy efficiency.
“Electronics today have an energy problem,” said Martin, Rice’s Robert A. Welch Professor of Materials Science and NanoEngineering. “Within the next five to 10 years, computing could use up as much as a quarter to a third of all the power generated, which is unsustainable.”