Ferromagnetism in bare gold nanoagglomerates produced by nanocluster deposition

Annika Venäläinen*, Pasi Jalkanen, Vladimir Tuboltsev, Kristoffer Meinander, Alexander Savin, Jyrki Räisänen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)57-60
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume454
DOIs
Publication statusPublished - 15 May 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Au cluster deposition
  • Ferromagnetism
  • Nanoagglomerate
  • Superparamagnetism

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