AI Insight
Researchers from NIMS and the University of Tokyo have created a composite material that incorporates three-dimensional nano-interfaces throughout its bulk structure by coating magnetic-insulator powder surfaces with metal and sintering them. This approach enabled them to observe spin-driven thermoelectric conversion in a macroscale insulating material, a phenomenon that was previously only achievable in nanoscale thin-film interfaces. The breakthrough involves embedding platinum channels that facilitate the thermoelectric effect at a larger, more practical scale.
Why it matters
This development could enable the production of bulk thermoelectric materials that convert waste heat into electricity using spin-based mechanisms, making the technology more scalable for practical energy harvesting applications. Moving spin-based thermoelectric conversion from thin films to bulk materials represents a significant step toward commercial viability.
Understand the Science
A joint research team from NIMS and the University of Tokyo has developed a new composite in which three-dimensional nano-interfaces are distributed throughout the material by coating the surfaces of magnetic-insulator powders with a metal and sintering them. Using this structure, the team succeeded in observing thermoelectric conversion driven by spins in an insulator, a phenomenon previously observed only at nanoscale thin-film interfaces, in a macroscale material.
Source: Embedded platinum channels bring nanoscale spin-based thermoelectric conversion to bulk materials