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 language | English |
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Pages (from-to) | 2464-2467 |
Number of pages | 4 |
Journal | Polyhedron |
Volume | 24 |
Issue number | 16-17 |
DOIs | |
Publication status | Published - Nov 17 2005 |
Keywords
- AFMR
- Magnetic torque measurement
- γ-p-NPNN
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry