Half Metallic Ferromagnetism in Eu-Doped CdS Nanoparticles

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• 作者：Rui Zhao ; Pan Wang ; Tianye Yang ; Zhifang Li ; Bingxin Xiao ; Mingzhe Zhang
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：December 24, 2015
• 年：2015
• 卷：119
• 期：51
• 页码：28679-28684
• 全文大小：489K
• ISSN：1932-7455

文摘

Hexagonal wurtzite structured Eu³⁺-doped CdS nanoparticles (CdS:Eu NPs) were synthesized via a gas–liquid phase chemical deposition method. It is found that as-prepared CdS:Eu NPs exhibit distinct and stronger room-temperature ferromagnetism (RTFM). The ferromagnetism as observed from the zero-field-cooling and field-cooling curves of CdS:Eu NPs has been further confirmed by our first-principles calculations based on the density functional theory. Because of a coupling between the 4f-related spin polarized states and the carriers, the half metallic ferromagnetic CdS:Eu NPs could be a desired material for the use in spintronics. The origin of ferromagnetism in CdS:Eu NPs is attributed primarily to the Eu atoms and partially to the Cd vacancies as well.