Electron spin resonance observation of dehydration-induced spin excitations in quasi-one-dimensional iodo-bridged diplatinum complexes

Hisaaki Tanaka, Shin Ichi Kuroda, Hiroaki Iguchi, Shinya Takaishi, Masahiro Yamashita

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5 Citations (Scopus)

Abstract

Electron spin resonance (ESR) measurements have been performed on a series of quasi-one-dimensional iodo-bridged diplatinum complexes K 2[C 3H 5R(NH 3) 2][Pt 2(pop) 4I]•4H 2O (pop = P 2H 2O 52 -; R = H, CH 3, or Cl), where dehydration/rehydration of the crystalline water switches the electronic state reversibly with retention of single crystallinity. We have observed a nonmagnetic nature in as-grown samples, whereas in the dehydrated samples, a clear enhancement of the spin susceptibility has been observed above ∼80 K with the activation energy ranging 50-60 meV. The activated spins originate from isolated Pt3 + state on the chain, as confirmed from the principal g values. Concomitantly, the ESR linewidth exhibits a prominent motional narrowing, suggesting that the activated Pt3 + spins are mobile solitons generated in the doubly degenerate charge-density-wave states of the dehydrated salts.

Original languageEnglish
Article number073104
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number7
DOIs
Publication statusPublished - 2012 Feb 21

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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