Sulfur antisite-induced intrinsic high-temperature ferromagnetism in Ag2S:Y nanocrystals

Literature Information

Publication Date 2016-03-10
DOI 10.1039/C5CP07690K
Impact Factor 3.676
Authors

Pan Wang, Tianye Yang, Rui Zhao, Mingzhe Zhang


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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.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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