Low-temperature structure and ESR study of quasi-one-dimensional ferromagnet γ-p-NPNN

T. Kambe, K. Kajiyoshi, K. Oshima, M. Tamura, M. Kinoshita

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The low-temperature structure analysis and low-temperature ESR were performed in the γ-phase of p-NPNN, which is considered to be as a quasi-one-dimensional ferromagnet above the antiferromagnetic ordering temperature (0.65 K without a static magnetic field). No structural phase transition was observed below 30 K, but we found the large thermal shrinkage between the intra-chain p-NPNN molecules along c-axis. This result suggests that the one-dimensionality of the ferromagnetic chain is effectively enhanced at lower temperature, since the geometry through NO-NO2 contact gives rise to the strong ferromagnetic interaction. Below 0.6 K, we succeeded in observing the antiferromagnetic resonance (AFMR) using the low frequency (∼300 MHz) and low-temperature (0.5 K) ESR. The frequency-field relation is well reproduced by the two-sublattice model with orthorhombic anisotropy.

Original languageEnglish
Pages (from-to)301-304
Number of pages4
JournalSynthetic Metals
Volume154
Issue number1-3
DOIs
Publication statusPublished - Sep 22 2005

Keywords

  • Diffraction and scattering
  • Magnetic measurement
  • Magnetic phase transition
  • X-ray emission

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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