2014/12/31 by Shou-Jyun Zou, Sheng-Tsung Wang, Ming-Fan Wu +4 · 4 citations
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Chalcogenide Semiconductor Thin Films #Chemical physics #Chemistry #Condensed matter physics #Doping #Ferromagnetism #Ion #Magnetic semiconductor #Magnetism #Materials science #Nanocrystal #Nanotechnology #Optoelectronics #Paramagnetism #Physics #Quantum Dots Synthesis And Properties #Semiconductor #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall
paper · pdf · doi:10.1021/nn5056892
published in ACS Nano 9(1), 503-511 (American Chemical Society) · 26 pages, 5 figures
openalex publication_date 2014/12/31 · arxiv created 2015/05/01 · arxiv updated 2019/02/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 development of an analysis method with the exploitation of group theory technique that allows us to distinguish the anti-ferromagnetic interactions between aggregative Mn(2+) 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 Mn(2+) ions and the fraction of aggregative ones in the measured CdSe:Mn nanocrystals.