Observation of antiferromagnetic resonance in the DPPH free radical
Teitel'baum G. B., Kharakhash'yan E. G., Khlebnikov S. Ya., Zenin A. G.
An antiferromagnetic-resonance signal has been observed in the DPPH free radical at temperatures below 0.76 K. A "spin-flop" phase exists in this system. A magnetic state diagram is constructed.