Electron spin resonance studies of silver complexes of octaethylporphyrin cocrystallized with fullerenes: Observation of triplet spin states due to magnetic dipolar interactions

K. Marumoto, H. Takahashi, H. Tanaka, S. Kuroda, T. Ishii, R. Kanehama, N. Aizawa, M. Yamashita

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4 Citations (Scopus)

Abstract

Electron spin resonance (ESR) studies have been performed on newly synthesized AgII complexes of octaethylporphyrin (oep) cocrystallized with fullerenes (C60 and C70) using single crystals and polycrystals between 4 and 300 K. We have observed the fine structure in the ESR spectra of AgII(oep)C60; the fine structure is ascribed to the triplet spin states due to magnetic dipolar interactions between S=1/2 spins of AgII ions in adjacent oep molecules. The analysis of the angular dependence of the g value and fine-structure splitting width for AgII(oep)C60 single crystals determines the angle between the Ag-Ag direction and the normal of the Ag-oep plane as 37°. The results of AgII(oep)C70 are similar to those of AgII(oep)C60. The spin susceptibility of all complexes almost obeys the Curie law, indicating the exchange interactions between the spins of Ag ions are negligible in the temperature region measured.

Original languageEnglish
Pages (from-to)8753-8762
Number of pages10
JournalJournal of Physics Condensed Matter
Volume16
Issue number47
DOIs
Publication statusPublished - 2004 Dec 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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