Magnetism of gold nanorods probed using electron spin resonance

Y. Inagaki, H. Yonemura, N. Sakai, Y. Makihara, T. Kawae, S. Yamada

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5 Citations (Scopus)


Electron spin resonance (ESR) spectroscopy has been performed for gold nanorods (AuNRs) of four different sizes covered with a diamagnetic stabilizing component, cetyltrimethylammonium bromide. ESR signals were detected in AuNRs except the largest one. Two smallest AuNRs showed an abrupt change in the temperature dependence of resonance field and line width at around 60 K, indicating ferromagnetic phase transition. In medium-size AuNRs, the resonance with a large shift was observed below 100 K. The resonance field shifts at the lowest temperature exhibit systematic variation with the system size, which is explained by considering magnetic anisotropy for the ferromagnetic resonance.

Original languageEnglish
Article number072404
JournalApplied Physics Letters
Issue number7
Publication statusPublished - Aug 15 2016

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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