Magnetic field induced extinction of light in a suspension of Fe3O4 nanoparticles

被引：54

作者：

Philip, John ^{[1
]}

Laskar, J. M. ^{[1
]}

Raj, Baldev ^{[1
]}

机构：

[1] Indira Gandhi Ctr Atom Res, Met & Mat Grp, Kalpakkam 603102, Tamil Nadu, India

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 22期

关键词：

D O I：

10.1063/1.2939100

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report magnetic field induced extinction of light in Mie regime using a magnetic nanofluid containing Fe(3)O(4) nanoparticles of 6.7 nm. At a critical applied magnetic field (H(C2)), the transmitted light intensity becomes extinct where the H(C2) follows a power law decay with volume fraction of nanoparticles (H(C2)infinity phi(-x), where x=0.283) indicating a structural transition. The light transmission was reversible with the magnetic field. We discuss various possible mechanisms responsible for the extinction of light under external magnetic field. The experimental finding may have significant application in tunable light controlling devices. (C) 2008 American Institute of Physics.

引用

页数：3

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