Antiferromagnetic resonance in quasi-one-dimensional ferromagnet γ-p-NPNN

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The low frequency (∼300 MHz) and low-temperature (0.4 K) 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). Below 0.6 K, we succeeded in observing the antiferromagnetic resonance (AFMR) for the first time. The frequency-field relation is well reproduced by the two-sublattice model with orthorhombic anisotropy. In addition, we measured magnetic torque using small single crystal, which has the dimension of 0.25 × 0.10 × 0.10 mm3. A spin-flop transition and AF-paramagnetic (AF-P) transition are observed at 470 and 2100 G at 0.4 K, respectively. Both AFMR and magnetic torque measurements indicate that the spin-easy axis is almost parallel to the direction to phenyl ring from the ONCNO fragments.

Original languageEnglish
Pages (from-to)2464-2467
Number of pages4
JournalPolyhedron
Volume24
Issue number16-17
DOIs
Publication statusPublished - Nov 17 2005

Keywords

  • AFMR
  • Magnetic torque measurement
  • γ-p-NPNN

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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