Conducting molecular magnets based on TTF-derivatives

A. Miyazaki*, K. Enomoto, K. Okabe, H. Yamazaki, J. Nishijo, T. Enoki, E. Ogura, K. Ugawa, Y. Kuwatani, M. Iyoda

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

The crystal structures, electronic and magnetic properties of conducting molecular magnets developed in our group are reviewed. (DMET)2FeBr4 is composed of alternating stacks of quasi-one-dimensional (1D) donor sheets and square lattice magnetic anion sheets. This salt undergoes an SDW transition of the donor layer at 40 K and an antiferromagnetic transition of Fe3+ spins on the anion layer at 3.7 K. The one-to-one correspondence of the anomalies appearing on the magnetization curves with those on the magnetoresistance supports the presence of the π-d interaction. (EDO-TTFI2)2[M(mnt)2] (M = Ni,Pt) consists of 1D chains of conducting donors and magnetic anions aligned in parallel. These salts show metallic conductivity accompanied with a metal-insulator transition around 90 K. Localized spins on the anions behave as a 1D ferromagnet, whose origin is explained by McConnell's first model. The properties of related materials, (EDTDM)2FeBr4, (EDS-TTF)2FeBr4 and (EDO-TTFBr2)2FeBr4, are also presented.

Original languageEnglish
Pages (from-to)547-562
Number of pages16
JournalJournal of Solid State Chemistry
Volume168
Issue number2
DOIs
StatePublished - 2002/11/01

Keywords

  • Molecular conductors
  • Molecule-based magnets
  • TTF derivatives
  • π-d interaction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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