Thomas Anoop, Devaux Eloise, Nagarajan Kalaivanan, Rogez Guillaume, Seidel Marcus, Richard Fanny, Genet Cyriaque, Drillon Marc, Ebbesen Thomas W
University of Strasbourg, CNRS, ISIS, 8 allée G. Monge, 67000 Strasbourg, France.
University of Strasbourg, CNRS, IPCMS, 23 rue du Loess, 67034 Strasbourg, France.
Nano Lett. 2021 May 26;21(10):4365-4370. doi: 10.1021/acs.nanolett.1c00973. Epub 2021 May 4.
Light-Matter strong coupling in the vacuum limit has been shown, over the past decade, to enhance material properties. Oxide nanoparticles are known to exhibit weak ferromagnetism due to vacancies in the lattice. Here we report the 700-fold enhancement of the ferromagnetism of YBaCuO nanoparticles under a cooperative strong coupling at room temperature. The magnetic moment reaches 0.90 μ/mol, and with such a high value, it competes with YBaCuO superconductivity at low temperatures. This strong ferromagnetism at room temperature suggest that strong coupling is a new tool for the development of next-generation magnetic and spintronic nanodevices.
在过去十年中，已证明在真空极限下光与物质的强耦合可增强材料性能。由于晶格中的空位，氧化物纳米颗粒已知表现出弱铁磁性。在此，我们报道了在室温下协同强耦合作用下，YBaCuO纳米颗粒的铁磁性增强了700倍。磁矩达到0.90 μ/mol，如此高的值使其在低温下与YBaCuO超导性相互竞争。室温下的这种强铁磁性表明，强耦合是开发下一代磁性和自旋电子纳米器件的一种新工具。
