μSR studies in an I2-doped phenylenediamine polymer

We report μSR studies of the recently synthesized I2-doped phenylenediamine polymer. Longitudinal-field spectra exhibit typical behavior of a spin-glass with a freezing temperatureTg ∼ 100 K and a spontaneous static local field ∼ 500 G at low temperatures. Preliminary magnetization measurements hint of antiferromagnetic spin coupling and hysteretic behavior aroundTg. These features suggest possible spin-glass and/or antiferromagnetic spin freezing with a high transition temperature due to the doped radical spins in this organic polymer.