Intrinsic magnetic moments of gold nanoparticles

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题名:	Intrinsic magnetic moments of gold nanoparticles
作者:	Li,CY;Wu,CM;Karna,SK;Wang,CW;Hsu,D;Wang,CJ;Li,WH
贡献者:	物理學系
关键词:	AU
日期:	2011
上传时间:	2012-06-11 10:49:21 (UTC+8)
出版者:	國立中央大學
摘要:	In this study the intrinsic magnetic moments developed in 4 nm bare fcc Au nanoparticles were investigated. The magnetization curves reveal a Langevin magnetic field profile, reflecting the existence of spontaneous magnetic moments. Neutron diffraction measurements detect a ferromagnetic moment. The magnetic diffraction patterns are consistent with a moment of <mu(Z)> = 0.14 mu(B) points in the crystallographic [111] direction at 5 K. Magnetostatic interparticle interactions weaken the localized magnetic moments but enhance the conduction electron density. These behaviors can be understood by considering the merging of the 5d and 6s electron bands triggered by finite-size effects and the lifting of band mixture by interparticle interactions.
關聯:	PHYSICAL REVIEW B
显示于类别:	[物理學系] 期刊論文

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