2kF transitions in a series of (DMET)2(X 1X2TCNQ) (X1, X2=Br, Cl, F, CH 3, H): Subsidiary lattice effect by anion radicals

T. Sato, T. Hasegawa, T. Akutagawa, T. Nakamura, R. Kondo

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Structural and magnetic properties were investigated in a series of isomorphous 2:1 donor-acceptor-type organic charge-transfer (CT) complexes of (DMET)2(X1X2TCNQ) [DMET denotes dimethyl(ethylenedithio)diselenadithiafulvalene, TCNQ denotes tetracyanoquinodimethane, X1, X2=Br, Cl,F,CH 3,H]. In these complexes, donors (D's) formed quasi-one-dimensional (Q1D) molecular stacks (D = + 1/2), which were bridged with each other, by acceptor molecules whose molecular planes were parallel to the stacking axes. By the magnetic measurements, we found that the compounds could be classified into two groups in terms of the 2kF transitions of the donor stacks: two complexes exhibited the transitions at around room temperature, while the other two at lower temperature below 10 K. We discuss the origin of the difference in the observed 2kF transitions in terms of the subsidiary lattice effect by the acceptor molecules on the Q1D donor stacks.

Original languageEnglish
Article number075103
Pages (from-to)751031-751035
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number7
Publication statusPublished - Feb 2004
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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