Magnetic and transport properties of Sb2Te3 doped with high concentration of Cr. (5th September 2017)

• Record Type: Journal Article
• Authors: Gupta, Sachin; Kanai, Shun; Matsukura, Fumihiro; Ohno, Hideo
• Is Part Of: Applied physics express. Volume 10:Number 10(2017)
• Publication Date: 2017-09-05
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/APEX.10.103001
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: We report on the molecular beam epitaxy and properties of a magnetic topological insulator (TI): Cr-doped Sb2 Te3 . Composition analysis reveals that Cr replaces Sb, and X-ray diffraction confirms that a single-phase textured crystal structure can be obtained for (Cr x Sb1− x )2 Te3 with x up to 0.44. A further increase in x results in phase separation or precipitates in the material. The Curie temperature T C increases with x up to 0.44 and reaches 250 K, which is the highest T C observed thus far in magnetically doped TIs.