Ferromagnetism mediated by Sb or Te atoms. Credit: Hiroshima University
A group of researchers in Japan and China identified the requirements for the development of new types of extremely low power consumption electric devices by studying Cr-doped (Sb, Bi)2Te3 thin films.
At extremely low temperatures, an electric 3current flows around the edge of the film without energy loss, and under no external magnetic field. This attractive phenomenon is due to the material’s ferromagnetic properties. For the first time, researchers have revealed the mechanism by which this occurs. “Hopefully, this achievement will lead to the creation of novel materials that operate at room temperature in the future,” said Prof Akio Kimura.
Their achievement can be traced back to the discovery of the quantum Hall ef...
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