A first principles study of uniaxial strain-stabilized long–range ferromagnetic ordering in electrenes. Issue 46 (11th November 2021)

• Record Type: Journal Article
• Authors: Zhou, Jun; Song, Xiaohe; Yang, Ming; Chai, Jianwei; Wong, Nancy Lai Mun; Shen, Lei; Wang, Shijie; Feng, Yuan Ping
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 46(2021)
• Page Start: 16576
• Page End: 16580
• Publication Date: 2021-11-11
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc04261k
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Uniaxial strains have been proposed to introduce in-plane magnetic anisotropy to electrene, LaBr2, stabilizing a long–range magnetic ordering of the magnetic anionic electrons. Abstract : A few two-dimensional (2D) magnets have an intrinsic easy axis, which is essential for long–range magnetic ordering required for applications. Here, we show that in the absence of external magnetic fields, uniaxial strains can stabilize long–range ferromagnetic ordering in a 2D electrene, LaBr2, by effectively changing its magnetic anisotropy from the original easy plane to an easy axis. Importantly, such manipulations do not affect the unique properties of its magnetic anionic electrons. The strain-dependent magnetic anisotropy is further understood by the Bruno's model. Monte Carlo simulations directly show an absence of collective magnetism in the pristine monolayer of LaBr2, but the emergence of long–range magnetic ordering with high Curie temperatures when uniaxial strains were applied. Our results pave way to utilize 2D magnetic materials with interesting properties in the absence of magnetic anisotropy for practical applications.