Antiferromagnetic ordering in the expanded (NH3)Rb3C60 fulleride

J. Arvanitidis, K. Papagelis, T. Takenobu, I. Margiolaki, K. Brigatti, K. Prassides, Y. Iwasa, A. Lappas

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The magnetic behavior of the ammoniated alkali fulleride (NH3)Rb3C60 is studied by means of μ+ spin relaxation (μ+SR) spectroscopy. The observation of a strongly damped oscillating component in the low-temperature zero-field μ+SR spectra reveals that its ground state is that of an ordered antiferromagnet, characterized by large spatially inhomogeneous effects. The temperature dependence of the μ+ spin precession frequency is consistent with that of a conventional 3D Heisenberg antiferromagnet (TN ∼ 51 K). The cooling rate of the sample affects sensitively the ordering of the magnetic moments, a behavior that can be attributed to the influence of the orientational order of the fullerene units on the exchange interactions.

Original languageEnglish
Pages (from-to)572-576
Number of pages5
JournalPhysica B: Condensed Matter
Volume326
Issue number1-4
DOIs
Publication statusPublished - 2003 Feb
Externally publishedYes

Keywords

  • Ammoniated alkali fullerides
  • Antiferromagnetic ordering

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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