title: Sulfur antisite-induced intrinsic high-temperature ferromagnetism in Ag₂S:Y nanocrystals.
abstract: There is an urgent need for a complete understanding of intrinsic ferromagnetism, due to the necessity for application of ferromagnetic semiconductors. Here, further insight into the magnetic mechanism of sulfur antisite-induced intrinsic high-temperature ferromagnetism is investigated in Ag2S:Y nanocrystals. The gas-liquid phase chemical deposition method is adopted to obtain the monoclinic Ag2S:Y nanocrystals. The field and temperature-dependent magnetization measurements demonstrate the robust high-temperature ferromagnetism of Ag2S:Y nanocrystals. As revealed in the magnetic origin study from first-principles calculations, the intrinsic sulfur antisite defect is only responsible for the creation of a magnetic moment which mainly comes from the S 3p and Ag 4d orbitals. Such a mechanism, which is essentially different from those of dopants and other native defects, provides new insight into the origin of the magnetism.
authors.affiliation: State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China. zhangmz@jlu.edu.cn.
authors.forename: Pan
authors.initials: P
authors.lastname: Wang
authors.forename: Tianye
authors.initials: T
authors.lastname: Yang
authors.forename: Rui
authors.initials: R
authors.lastname: Zhao
authors.forename: Mingzhe
authors.initials: M
authors.lastname: Zhang