XMCD Proof of Ferromagnetic Behavior in ZnO Nanoparticles
XMCD Proof of Ferromagnetic Behavior in ZnO Nanoparticles
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DOI：
10.1021/jp300837f
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发表时间：
2012-03-22
影响因子：
3.7
通讯作者：
Chaboy, J.
中科院分区：
文献类型：
--
作者：
Guglieri, C.;Laguna-Marco, M. A.;Chaboy, J.
结合特定元素的X射线吸收光谱（XAS）和X射线磁圆二色性（XMCD）研究的ZnO纳米粒子（NPs）与有机分子的上限证实了发生的内在铁磁（FML）的行为，直到室温（HTFM）。Zn K-边XMCD测量揭示了两种不同的磁性贡献的共存：从NP的核心的顺磁响应，和铁磁样的贡献源于之间的界面形成的ZnO核心的NP和有机分子。该界面的范围和构象取决于封端分子，并且如在ZnO/ZnS异质结构中所示，当形成整洁的界面时，FML行为得到加强。
The combined element-specific X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) study of ZnO nanoparticles (NPs) capped with organic molecules confirms the occurrence of intrinsic ferromagnetic-like (FML) behavior up to room temperature (HTFM). Zn K-edge XMCD measurements reveal the coexistence of two different magnetic contributions: a paramagnetic response from the core of the NP, and a ferromagnetic-like contribution stemming from the interface formed between the ZnO core of the NP and the organic molecule. The extent and conformation of this interface depends on the capping molecule, and as demonstrated in ZnO/ZnS heterostructures, the FML behavior is reinforced when neat interfaces are formed.