Abstract

X-band and millimeter wave ESR measurements have been performed on (DI-DCNQI) 2 Ag single crystals. X-band ESR measurements were carried out with the static magnetic field up to 1 T. Electron paramagnetic resonance was observed above 5 K. The one-dimensionality of this compound is discussed from the behavior of electron paramagnetic resonance. The millimeter wave ESR measurements in the frequency region from 40 to 315 GHz were carried out with the pulsed magnetic field up to 16 T in the temperature region from 1.8 to 70 K. Antiferromagnetic resonance (AFMR) modes with an easy axis type anisotropy were observed at 1.8 K. The analyses of AFMR modes showed that the easy axis is the c axis and the spin-flop field is 1.3 T.

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