Optical and Magnetic Properties of Mn-Doped ZnS Nanoparticles Synthesized by a Hydrothermal Method
| Autor: | Hoang Nam Nguyen, Hong Van Bui, Thanh Trung Truong, Nam Nhat Hoang, Van Ben Pham |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | IEEE Transactions on Magnetics. 50:1-4 |
| ISSN: | 1941-0069 0018-9464 |
| Popis: | The Mn-doped ZnS nanoparticles with $T_{d}^{2}-F\overline 43~{\rm m}$ cubic structure and an average crystalline size of about 16 nm were synthesized using the hydrothermal method at 220 $^{\circ}{\rm C}$ for 15 h from ${\rm Zn}({\rm CH}_{3}{\rm COO})_{2}(0.1{\rm M})$ , ${\rm Mn}({\rm CH}_{3}{\rm COO})_{2}(0.01{\rm M})$ , and ${\rm Na}_{2}{\rm S}_{2}{\rm O}_{3}(0.1{\rm M})$ as the precursors. The appearance of characteristic photoemission bands of ${\rm Mn}^{2+}(3{\rm d}^{5})$ 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 ${\rm Mn}^{2+}(3{\rm d}^{10})$ ions substituted for ${\rm Zn}^{2+}(3{\rm d}^{10})$ 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. |
| Databáze: | OpenAIRE |
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