Ferromagnetism in bare gold nanoagglomerates produced by nanocluster deposition

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Venäläinen , A , Jalkanen , P , Tuboltsev , V , Meinander , N K , Savin , A & Räisänen , J 2018 , ' Ferromagnetism in bare gold nanoagglomerates produced by nanocluster deposition ' , Journal of Magnetism and Magnetic Materials , vol. 454 , pp. 57-60 . https://doi.org/10.1016/j.jmmm.2018.01.041

Title: Ferromagnetism in bare gold nanoagglomerates produced by nanocluster deposition
Author: Venäläinen, Annika; Jalkanen, Pasi; Tuboltsev, Vladimir; Meinander, Nils Kristoffer; Savin, Alexander; Räisänen, Jyrki
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
Date: 2018-05-15
Language: eng
Number of pages: 4
Belongs to series: Journal of Magnetism and Magnetic Materials
ISSN: 0304-8853
URI: http://hdl.handle.net/10138/312427
Abstract: Abstract Recent research has shown unconventional magnetic properties in nanosized gold systems. These effects have mostly been detected in functionalized gold nanoparticles as well as in gold nanocrystalline films. We demonstrate ferro- and superparamagnetic behaviour in assemblies of bare gold nanoclusters. This is demonstrated by the characteristic ferromagnetic hysteresis with the temperature dependent saturation magnetization, remanence and coercivity in aggregates of small clusters. The detected magnetization is caused by the interaction between the separate clusters exhibiting an core-shell structure, and dependent on the total amount of gold confined in the samples. The behaviour is analogous to that of transition metal clusters.
Subject: Au cluster deposition
Nanoagglomerate
Ferromagnetism
Superparamagnetism
NANOPARTICLES
MAGNETIC-PROPERTIES
114 Physical sciences
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