Exposure of the Hidden Anti-Ferromagnetism in Paramagnetic CdSe:Mn Nanocrystals
| Autor: | Sheng Tsung Wang, Wen-Bin Jian, Shou Jyun Zou, Ming Fan Wu, Shun-Jen Cheng |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Condensed Matter - Mesoscale and Nanoscale Physics business.industry Magnetism Condensed Matter::Other General Engineering FOS: Physical sciences General Physics and Astronomy Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Ion Paramagnetism Condensed Matter::Materials Science Semiconductor Nanocrystal Ferromagnetism Chemical physics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Semiconductor nanocrystals General Materials Science Condensed Matter::Strongly Correlated Electrons business Analysis method |
| Popis: | We present theoretical and experimental investigations of the magnetism of paramagnetic semiconductor CdSe:Mn nanocrystals and propose an efficient approach to the exposure and analysis of the underlying anti-ferromagnetic interactions between magnetic ions therein. A key advance made here is the build-up of an analysis method with the exploitation of group theory technique that allows us to distinguish the anti-ferromagnetic interactions between aggregative Mn2+ ions from the overall pronounced paramagnetism of magnetic ion doped semiconductor nanocrystals. By using the method, we clearly reveal and identify the signatures of anti-ferromagnetism from the measured temperature dependent magnetisms, and furthermore determine the average number of Mn2+ ions and the fraction of aggregative ones in the measured CdSe:Mn nanocrystals. 26 pages, 5 figures |
| Databáze: | OpenAIRE |
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