Magnetism of a Two-Dimensional Weak-Ferromagnetic Organic Radical Crystal, 1,3,5-Triphenyl-6-Oxoverdazyl

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

Research output: Contribution to journalArticle

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Abstract

A genuine organic radical crystal 1,3,5-triphenyl-6-oxoverdazyl (TOV) has been revealed to be an S = 1/2 two-dimensional (2D) weak-ferromagnetic Heisenberg antiferromagnet with the exchange interaction 2J/kB = -9.0 K by the experiments of magnetic susceptibility, heat capacity, magnetization and electron paramagnetic resonance. The anomalous temperature dependence of the weak ferromagnetism at low temperatures is qualitatively explained by a four-sublattice model with two kinds of Dzyaloshinsky-Moriya (D-M) vectors of opposite sign on the ac-plane. The staggered susceptibility, which is a fictitious but intrinsic quantity for antiferromagnets, is estimated in TOV by making use of the canted weak ferromagnetic moments which dominate below 6 K. Especially the rapid growth of the magnetic susceptibility below 6 K is explained by the staggered susceptibility which makes the crossover effect from 2D Heisenberg to 2D Ising system, triggered by above the D-M anisotropy.

Original languageEnglish
Pages (from-to)2147-2156
Number of pages10
Journaljournal of the physical society of japan
Volume66
Issue number7
DOIs
Publication statusPublished - Jan 1 1997

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magnetic permeability
crystals
sublattices
ferromagnetism
crossovers
electron paramagnetic resonance
specific heat
moments
magnetization
temperature dependence
anisotropy
interactions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Magnetism of a Two-Dimensional Weak-Ferromagnetic Organic Radical Crystal, 1,3,5-Triphenyl-6-Oxoverdazyl. / Mito, Masaki; Nakano, Hiroyuki; Kawae, Tatsuya; Hitaka, Masako; Takagi, Seishi; Deguchi, Hiroyuki; Suzuki, Kentaro; Mukai, Kazuo; Takeda, Kazuyoshi.

In: journal of the physical society of japan, Vol. 66, No. 7, 01.01.1997, p. 2147-2156.

Research output: Contribution to journalArticle

Mito, M, Nakano, H, Kawae, T, Hitaka, M, Takagi, S, Deguchi, H, Suzuki, K, Mukai, K & Takeda, K 1997, 'Magnetism of a Two-Dimensional Weak-Ferromagnetic Organic Radical Crystal, 1,3,5-Triphenyl-6-Oxoverdazyl', journal of the physical society of japan, vol. 66, no. 7, pp. 2147-2156. https://doi.org/10.1143/JPSJ.66.2147
Mito, Masaki ; Nakano, Hiroyuki ; Kawae, Tatsuya ; Hitaka, Masako ; Takagi, Seishi ; Deguchi, Hiroyuki ; Suzuki, Kentaro ; Mukai, Kazuo ; Takeda, Kazuyoshi. / Magnetism of a Two-Dimensional Weak-Ferromagnetic Organic Radical Crystal, 1,3,5-Triphenyl-6-Oxoverdazyl. In: journal of the physical society of japan. 1997 ; Vol. 66, No. 7. pp. 2147-2156.
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AU - Hitaka, Masako

AU - Takagi, Seishi

AU - Deguchi, Hiroyuki

AU - Suzuki, Kentaro

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