Most of the metals are not magnetic at room temperature, but researchers at the University of Leeds in the UK published a report in a new issue of the journal Nature. They used molecular-level techniques to make non-magnetic metals magnetic like iron, promising for the future. Significantly expand the choice of magnetic materials for use in the industrial field.
Only three metals, iron, cobalt, and nickel, are magnetic at room temperature. The magnetic properties of metals are not only due to the presence of unpaired electrons, but also the interaction between these electrons.
The research team said that they found that films of copper and manganese can acquire magnetic properties by trapping electrons transported between a metal and a layer of organic molecules. This organic molecule is called fullerenes and its structure is a cage-like sphere formed by the interconnection of 60 carbon atoms. This structure is simple and stable.
Magnetic materials have a large number of applications in industrial and scientific fields, such as wind power devices, computer hard disks, and some medical devices. The researchers said that only the three metal elements iron, cobalt and nickel can be used to make magnetic materials will bring a great limit, if more elements can get magnetic, it will bring important changes, you can use copper in industrial production And other elements that are more abundant and have fewer side effects.
Oscar Céspedes, who led the study, said that his team will further study how to combine relevant technologies with suitable elements to produce new types of magnetic materials to promote the development of new technologies. (Reporter Zhang Jiawei)
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