Exchange interactions in the genuine organic ferromagnet accompanying pressure-induced ferro- to antiferromagnetic transition

Kazuyoshi Takeda, Masaki Mito, Tatsuya Kawae, Hiroyuki Deguchi, Seishi Takagi, Mitsutaka Okumura, Takashi Kawakami, Kizashi Yamaguchi, Minoru Kinoshita

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Abstract

The continuous variation of magnetic intermolecular interactions has been studied in the pressurized genuine organic ferromagnet, β-phase para-nitrophenyl nitronyl nitroxide (Tc = 0.61 K), in which a pressure-induced ferro- to antiferromagnetic transition was observed under pressure around 6.5 kbar at 0.45 K. The rotation of the radical group C6H4NO2 around its symmetrical axis in crystallized molecules is pointed out to be essential to change magnitude and a sign of the dominant exchange interactions, rather than the shrinkage of the lattice parameters under pressure.

Original languageEnglish
Pages (from-to)181-186
Number of pages6
JournalChemical Physics Letters
Volume308
Issue number3-4
DOIs
Publication statusPublished - Jul 23 1999

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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