Experimental Check of Heisenberg Chain Quantum Statistics for a Ferromagnetic Organic Radical Crystal

Kazuyoshi Takeda, Toshiyuki Hamano, Tatuya Kawae, Masako Hidaka, Minoru Takahashi, Syuji Kawasaki, Kazuo Mukai

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Abstract

One-dimensional quantum statistics has been studied at the limit of isotropic exchange interaction in the unpaired electron system of a ferromagnetic organic radical crystal, 3-(4-chlorophenyl)-l,5-diphenyl-6-oxoverdazyl. The characteristic field dependence of the magnetic heat capacity of this crystal is quantitatively explained by the theoretical values derived from the Bethe-ansatz technique applied to the quantum transfer matrix, with a unique intrachain exchange constant J/kB = 5.5K. By the simultaneous measurement of magnetic susceptibility and heat capacity, the three-dimensional ordering at Tc=0.21 K, which is triggered by a weak interchain coupling |zJ′|/KB = 3×10−2K, is confirmed.

Original languageEnglish
Pages (from-to)2343-2346
Number of pages4
Journaljournal of the physical society of japan
Volume64
Issue number7
DOIs
Publication statusPublished - Jul 1995

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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