High-Field Magnetization Study of the Doping Effect of Magnetic Impurity on the Organic Spin-Peierls System: p-CyDOV Radical Crystal

Kazuo Mukai, Masanobu Yanagimoto, Shinsuke Narimatsu, Hidesuke Maruyama, Yasuo Narumi, Koichi Kindo

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The field dependence of the magnetization (H = 0-55 T) of the mixed verdazyl radical crystals, (p-CyDOV)1-x(p-CyDTV)x (x = 0, 0.01, 0.02, 0.03, 0.05, and 0.07) was measured to study the doping effect of magnetic impurity (p-CyDTV) on the organic spin-Peierls (SP) system, 3-(4-cyanophenyl)-1,5-dimethyl-6-oxoverdazyl (p-CyDOV) radical crystal, where the >C=O group in p-CyDOV is replaced by the >C=S group in p-CyDTV. The effect of doping on SP system is very remarkable. We have found that the high-field magnetization M(x, H) curves of the doped organic SP system below Tsp = 15.0 K can be well explained by the sum of the magnetization (M) of the spin-Peierls state (CSP(x)MSP(H)), one dimensional (ID) Heisenberg antiferromagnet (CID-HAF(x)MID-HAF(H)), and Curie impurity (CCurie(x)Mcurie(H)), where C i(x) is the fraction of the i th contribution. The result suggests the coexistence of SP state and antiferromagnetic long-range order in the doped p-CyDOV radical system at low temperature.

Original languageEnglish
Pages (from-to)2539-2545
Number of pages7
Journaljournal of the physical society of japan
Volume71
Issue number10
DOIs
Publication statusPublished - 2002 Oct 1

Keywords

  • Doping effect
  • High field magnetization
  • Magnetic susceptibility
  • Organic radical crystal
  • Spin-Peierls transition
  • Verdazyl radical

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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