Design of one-dimensional ferromagnet based on polyacetylene chain

Kazunari Yoshizawa, Kazuyoshi Tanaka, Tokio Yamabe

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

As a model for organic ferromagnetism in a one-dimensional system, substituted polyacetylenes are re-considered on the basis of the molecular orbital (MO) and the crystal orbital (CO) methods. The semiempirical MO calculations with configuration interaction for the dimer model show that the exchange interaction on poly[(4-oxyphenyl)acetylene] (1) is negative in spite of Ovchinnikov's prediction, due to the direct interaction between the adjacent pendant spins. On the other hand, it is shown that a polyacetylene chain with phenoxy radicals as pendants on every other active site can become a one-dimensional feromagnet. Moreover, the CO calculations by means of the unrestricted Hartree-Fock method give a theoretical background for the realization of a ground state with macroscopic spin alignment on the improved model chain.

Original languageEnglish
Pages (from-to)279-283
Number of pages5
JournalSynthetic Metals
Volume60
Issue number3
DOIs
Publication statusPublished - Oct 1 1993
Externally publishedYes

Fingerprint

Polyacetylenes
polyacetylene
Orbital calculations
Molecular orbitals
molecular orbitals
orbitals
Acetylene
Crystals
Ferromagnetism
Exchange interactions
acetylene
Dimers
Ground state
ferromagnetism
configuration interaction
crystals
alignment
dimers
interactions
ground state

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Design of one-dimensional ferromagnet based on polyacetylene chain. / Yoshizawa, Kazunari; Tanaka, Kazuyoshi; Yamabe, Tokio.

In: Synthetic Metals, Vol. 60, No. 3, 01.10.1993, p. 279-283.

Research output: Contribution to journalArticle

Yoshizawa, Kazunari ; Tanaka, Kazuyoshi ; Yamabe, Tokio. / Design of one-dimensional ferromagnet based on polyacetylene chain. In: Synthetic Metals. 1993 ; Vol. 60, No. 3. pp. 279-283.
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