Title :
Optical and Magnetic Properties of Mn-Doped ZnS Nanoparticles Synthesized by a Hydrothermal Method
Author :
Hong Van Bui ; Hoang Nam Nguyen ; Nam Nhat Hoang ; Thanh Trung Truong ; Van Ben Pham
Author_Institution :
Vietnam Nat. Univ.-Hanoi Univ. of Sci., Hanoi, Vietnam
Abstract :
The Mn-doped ZnS nanoparticles with T2d - F4̅3m cubic structure and an average crystalline size of about 16 nm were synthesized using the hydrothermal method at 220 °C for 15 h from Zn(CH3COO)2 (0.1M), Mn(CH3COO)2 (0.01M), and Na2S2O3 (0.1 M) as the precursors. The appearance of characteristic photoemission bands of Mn2+ (3d5) ions at 390, 430, 467, and 493 nm in the photoluminescence excitation spectra while monitoring the yellow-orange band at 585 nm showed that the Mn2+ (3d10) ions substituted for Zn2+ (3d10) ions in ZnS matrix and caused the ferromagnetism of Mn-doped ZnS nanoparticles. The dependence of photoluminescence, photoluminescence excitation spectra, and magnetization curves on Mn content and the wavelength of excitation radiation were reported.
Keywords :
II-VI semiconductors; ferromagnetic materials; liquid phase deposition; magnetisation; manganese; nanofabrication; nanoparticles; photoluminescence; semiconductor growth; semimagnetic semiconductors; wide band gap semiconductors; zinc compounds; Hydrothermal Method; T2d - F4̅3m cubic structure; ZnS:Mn; characteristic photoemission band; crystalline size; ferromagnetism; magnetic properties; magnetization curve; nanoparticles; optical properties; photoluminescence excitation spectra; temperature 220 degC; time 15 h; yellow-orange band; Absorption; Crystals; Ions; Magnetic properties; Manganese; Nanoparticles; Photoluminescence; Nanoparticle; photoluminescence; photoluminescence excitation;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2300187
