Symmetry control of the spin hamiltonian of the haldane compound Ni(C 2H8O4)2NO2(ClO 4) by external pressures

Takehiro Kinoshita, Masaki Mito, Tatsuya Kawae, Kazuyoshi Takeda

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We measured the magnetic susceptibility χ(T) of the Haldane compound Ni(C2H8O4)2 NO2(ClO 4) (NENP) under hydrostatic pressure P. With increase of the pressure, the system tends to change from the O(2) symmetry to the SU(2) symmetry, similarly to the results of neutron scattering experiment under hydrostatic pressure by Zaliznyak et al. (Phys. Rev. B 57 (1998) 5200). Within our experimental range of hydrostatic pressure up to about 1 GPa, we did not observe any anomaly indicating the three-dimensional magnetic long range ordering and the quantum phase transition.

Original languageEnglish
Pages (from-to)1205-1206
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberII
Publication statusPublished - May 2003

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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