Quantum spins in Mackay icosahedral gold nanoparticles

Chun Ming Wu, Chi Yen Li, Yen Ting Kuo, Chin Wei Wang, Sheng Yun Wu, Wen Hsien Li

研究成果: 雜誌貢獻期刊論文同行評審

23 引文 斯高帕斯(Scopus)

摘要

We report on the direct observation of the intrinsic magnetization behavior of Mackay icosahedral Au nanoparticles. The spin arrangements in 3.5-nm icosahedral Au particles are found to be ferrimagnetic-like, where the core and surface moments point in opposite directions, with a net spontaneous magnetic moment of 16 μB per particle. The unpaired spins behave as J = 1/2 quantum spins. The average level separation is found to be a factor of ~1.53 larger than that estimated according to the Kubo formula for spherical Au particles. This reflects the fact that there are considerably fewer atoms packed in a particle with an icosahedral geometry than with a spherical one.

原文???core.languages.en_GB???
頁(從 - 到)177-185
頁數9
期刊Journal of Nanoparticle Research
12
發行號1
DOIs
出版狀態已出版 - 1月 2010

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