Thin films of magnetically doped topological insulator with carrier-independent long-range ferromagnetic order.

Chang, Cui-Zu; Zhang, Jinsong; Liu, Minhao; Zhang, Zuocheng; Feng, Xiao; Li, Kang; Wang, Li-Li; Chen, Xi et al. · Adv Mater · 2013

basic_science · Level V

Where this comes from

Abstract

Thin films of magnetically doped topological insulators Cr(0.22) (Bi(x) Sb(1-x) )(1.78) Te(3) are found to possess carrier-independent long-range ferromagnetic order with perpendicular magnetic anisotropy. The anomalous Hall resistance is greatly enhanced, up to one quarter of quantum Hall resistance, by depletion of the carriers. The results demonstrate this material as a promising system to realize the quantized anomalous Hall effect.