Construction of a quantum-spin system of S = 1/2 antiferromagnetic chain with the next-nearest-neighbor interactions

Yuko Hosokoshi, Keiichi Katoh, Katsuya Inoue, Tsuneaki Goto

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We have newly synthesized organic radicals F2PIMNH and Cl2PIMNH, where F2PIMNH = 2-[4′-N-tert-butylamino-2′,6′-difluorophenyl]-4,4,5,5- tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl and Cl2PIMNH = 2-[4′-N-tert-butylamino-2′,6′-difluorophenyl]-4,4,5,5- tetramethyl-4,5-dihydro-1H-imidazol-1-oxyl. Both crystals include zigzag chains made of hydrogen bondings. The magnetism of Cl2PIMNH is explained by the Heisenberg antiferromagnetic uniform chain model with 2J/kB = -3.6 K and gapless ground state is suggested. On the other hand, static magnetic measurements of F2PIMNH suggest the nonmagnetic ground state and the existence of a finite gap in its excitation spectrum. In this crystal, the next-nearest-neighbor contacts are seen, which are believed to be the origin of the energy gap.

Original languageEnglish
Pages (from-to)2910-2913
Number of pages4
Journaljournal of the physical society of japan
Volume68
Issue number9
DOIs
Publication statusPublished - 1999 Jan 1
Externally publishedYes

Keywords

  • Antiferromagnetic chain
  • Energy gap
  • Next-nearest-neighbor interactions
  • Organic radical
  • Quantum spin

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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