Singlet ground states in an organic S = 1/2 spin ladder and a novel double spin chain of ferromagnetic dimers formed by an organic tetraradical

Keiichi Katoh, Yuko Hosokoshi, Katsuya Inoue, Tsuneaki Goto

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

We have synthesized the novel organic polyradicals BIP-BNO and BIP-TENO, which crystallize to form spin systems with a double spin chain, where BIP-BNO and BIP-TENO denote 3,5′-bis(N-tert-butylaminoxyl)-3′,5-dibromobiphenyl and 3,3′,5,5′-tetrakis(N-teri-butylaminoxyl)biphenyl, respectively. The crystals of BIP-BNO form a two-leg ladder of S = 1/2 with antiferromagnetic legs and rungs. The ground state of this material is singlet. The BIP-TENO molecule includes S = 1/2 spin pairs (dimers) in which the two spins are coupled ferromagnetically. The BIP-TENO crystals form a double spin chain consisting of dimers. All dimers interact antiferromagnetically with each other. This system can be regarded as an antiferromagnetic two-leg ladder when the dimer is taken as a unit. The ground state of this material is singlet and the existence of excitation gaps is suggested by the temperature dependence of the static magnetic susceptibility.

Original languageEnglish
Pages (from-to)1008-1011
Number of pages4
Journaljournal of the physical society of japan
Volume69
Issue number4
DOIs
Publication statusPublished - 2000 Apr
Externally publishedYes

Keywords

  • Double chain
  • Excitation gap
  • Organic radical
  • Quantum spin
  • Singlet ground state
  • Spin pair
  • Two-leg ladder

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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