Enhanced stability and stacking dependent magnetic/electronic properties of 2D monolayer FeTiO3 on a Ti2CO2 substrate. Issue 48 (26th November 2019)

• Record Type: Journal Article
• Authors: Jin, Cui; Shang, Jing; Tang, Xiao; Tan, Xin; Smith, Sean C.; Niu, Chengwang; Dai, Ying; Kou, Liangzhi
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 48(2019)
• Page Start: 15308
• Page End: 15314
• Publication Date: 2019-11-26
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc04979g
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : With large magnetic moments, complete spin-polarization, high T C, and tunable magnetism characters, 2D FeTiO3 /Ti2 CO2 is proposed as an ideal material for high-performance spintronics. Abstract : A 2D FeTiO3 magnetic monolayer which was recently exfoliated from non-van der Waals layered bulk crystals has opened the research era of low-dimensional magnets, however its structural and chemical instability hampered its practical application. Through first-principles calculations, we found that the stability of 2D FeTiO3 can be obviously enhanced by a monolayer Ti2 CO2 substrate and simultaneously the magnetic/electronic properties can be well regulated. Depending on the FeTiO3 /Ti2 CO2 stacking configurations, the system exhibits different magnetic and electronic behaviors, which can be either ferromagnetic or antiferromagnetic with the feature of half-metallic (with 100% spin-polarization ratio) or metallic. Moreover, it was also found that the interfacial magnetic coupling orders can be precisely modulated with an external electric field (−0.4 to 0.2 V Å −1 ). In particular, the Curie temperature is predicted to be 315 K, rendering the magnetism stable at room temperature. These interesting properties make 2D FeTiO3 /Ti2 CO2 a promising candidate material for spintronic device applications.