Surfactant-induced enhanced room temperature ferromagnetism in Zn0.96Mn0.03Li0.01O nanoparticles: Prepared by solid-state pyrolitic reaction
| Autor: | O. D. Jayakumar, K. V. Rao, Ajayan Vinu, Ramakant Mahadeo Kadam, Avesh K. Tyagi, Anjana Asthana, I. K. Gopalakrishnan |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Condensed matter physics Analytical chemistry Magnetic semiconductor Condensed Matter Physics law.invention Inorganic Chemistry Magnetization Ferromagnetism X-ray photoelectron spectroscopy law Impurity Materials Chemistry Calcination Electron paramagnetic resonance Wurtzite crystal structure |
| Zdroj: | Journal of Crystal Growth. 307:315-320 |
| ISSN: | 0022-0248 |
| DOI: | 10.1016/j.jcrysgro.2007.06.027 |
| Popis: | We report the synthesis of nanoparticles of Zn0.96Mn0.03Li0.01O by a low-temperature solid-state pyrolitic reaction, followed by a surfactant-assisted calcination at 400 °C. The X-ray diffraction and transmission electron microscopy analyses showed the formation of impurity free nanocrystals of Mn doped Li co-doped ZnO with wurtzite structure. XPS data revealed that Mn exists in +2 oxidation state. DC magnetization measurements as a function of field and temperature showed enhanced room temperature ferromagnetism for the surfactant-treated Zn0.96Mn0.03Li0.01O. FMR signal observed in the EPR spectrum further confirmed its ferromagnetic nature. |
| Databáze: | OpenAIRE |
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