Magnetism of an organic radical crystal with weak ferromagnetic moment below 5.4 K

Kazuyoshi Takeda, Masaki Mito, Hiroyuki Nakano, Tatsuya Kawae, Masako Hitaka, Seishi Takagi, Hiroyuki Deguchi, Syuji Kawasaki, Kazuo Mukai

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6 Citations (Scopus)

Abstract

From the measurements of magnetic susceptibility, heat capacity, magnetization and EPR, the magnetism of the organic radical crystal of 1,3,5-triphenyl-6-oxoverdazyl is revealed to be descrived by a two-dimensional quantum Heisenberg antiferromagnet with the effective intra-plane exchange interaction J/kB=-4.3 K. The appearance of weak ferromagnetic moment is observed below 5.4 K. The magnetic susceptibility, however, shows its broad maximum around 2 K and decrease toward the low temperatures. These results are shown to be described by a four-sublattice model with two Dzyaloshinsky-Moriya vectors of opposite sign on the ac-plane. A proposal is made for crystal symmetry in which weak ferromagnetic moment is stabilized without direct ferromagnetic interactions.

Original languageEnglish
Pages (from-to)431-438
Number of pages8
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume306
DOIs
Publication statusPublished - Jan 1 1997

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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