Abstract
We report spin-glass transition at room temperature (RT) and cluster-glass behavior below RT for Fe doped In 2 O 3 powders with the atomic ratio of In : Fe = 1.85 : 0.15 grown in an oxygen atmosphere. In ac susceptibility, a large peak and a small cusp were observed at RT and ≈30 K, respectively. The peak at RT shifted to higher temperatures with an increase of applied field frequency, while the cusp showed no frequency dependence. Third harmonic nonlinear susceptibility exhibited a divergent peak at RT. Field-cooled dc susceptibility increased almost linearly below RT, whereas zero-field-cooled dc susceptibility deviated below the field-cooled one with lowering temperature.