Magnetism and photoluminescence of Mn:ZnO/Mn:ZnS heterostructures

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Abstract

Mn:ZnO/Mn:ZnS core-shell heterostructures, in which Mn2+ ions are incorporated into ZnO and ZnS host lattice by replacing Zn2+ ion sites, have been synthesized by coating single-crystalline Mn:ZnO nanorods with a thin layer of Mn:ZnS nanocrystals. The heterostructures possess visible/ultraviolet photoluminescences and intrinsic room-temperature ferromagnetism. Photoluminescent spectrum exhibits enhanced ultraviolet emission of Mn:ZnO, defect-related green emission of Mn:ZnS, and strong orange emission due to 4T1(4G)-6A1( 6S) transition of Mn2+ in ZnS. A strong ferromagnetic layer is found to exist on the surface of the Mn:ZnO core, which makes a much larger contribution to the macroscopic ferromagnetism of the heterostructures.

Original languageEnglish
Pages (from-to)405-408
Number of pages4
JournalMaterials Letters
Volume92
DOIs
StatePublished - 2013
Externally publishedYes

Keywords

  • Luminescence
  • Magnetic materials
  • Semiconductors

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