The pseudo‐brookite spin‐glass system studied by means of muon spin relaxation

Zero‐field muon spin relaxation (μSR) experiments have been performed on the spin glass Fe1.75Ti1.25O5. Above the spin‐glass temperature of 44 K a distinct exponential μSR rate (λ) is observed, while below T g a square‐root exponential decay occurs, indicating fast spin fluctuations. Near 8 K, a maximum in λ is indicative of transverse spin ordering. The low λ values and the sharp λ peak at T g are very promising for the study of spin freezing models like the Vogel–Fulcher law or the power law.