Large magnetic moment of gadolinium substituted topological insulator: Bi1.98Gd0.02Se3

Y. R. Song, Fang Yang, M. Yao, Fengfeng Zhu, Lin Miao, Jinpeng Xu, Meixiao Wang, H. Li, Xu-Ping Yao, Fuhao Ji,

Applied Physics Letters · 2012 · 47 citations · 23 references

Concepts

Abstract

The crystal structure, electronic, and magnetic properties of Gadolinium (Gd) substituted Bi2Se3—represented by Bi1.98Gd0.02Se3—were investigated systematically by scanning tunneling microscopy, angle-resolved photoemission spectroscopy, and superconducting quantum interference device. Gd dopants with valence of 3+ were mainly found to substitute Bi atoms. Each Gd3+ ion has a magnetic moment as large as ∼6.9μB in the bulk paramagnetic state.

References

23