Zhao Duanduan, Gao Bo, An Guangyu, Xu Song, Tian Qingyong, Xu Qun
College of Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450052, China.
College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450052, China.
Angew Chem Int Ed Engl. 2024 Nov 11;63(46):e202412811. doi: 10.1002/anie.202412811. Epub 2024 Sep 12.
Ferromagnetism in the two-dimensional limit has become an intriguing topic for exploring new physical phenomena and potential applications. To induce ferromagnetism in 2D materials, intercalation has been proposed to be an effective strategy, which could introduce lattice distortion and unpaired spin into the material to modulate the magnetocrystalline anisotropy and magnetic exchange interactions. To strengthen the understanding of the magnetic origin of 2D material, Cu was introduced into a 2D WO through chemical intercalation in this work (2D Cu/WO). In contrast to the diamagnetic nature of Cu and WO, room-temperature ferromagnetism was characterized for 2D Cu/WO. Experimental and theoretical results attribute the ferromagnetism to the bound magnetic polaron in 2D Cu/WO, which is consist of unpaired spins from W/W with localized carriers from oxygen vacancies. Overall, this work provides a novel approach to introduce ferromagnetism into diamagnetic WO, which could be applied for a wider scope of 2D materials.
