Abstract
Glassy ferromagnetism and the magnetic frustration effect in La0.7Ba0.3Mn0.7Ti0.3O3 were investigated by means of dc magnetization, ac susceptibility, and electron-spin-resonance (ESR) measurements. As a result, the spin-glass (SG) phase-transition temperature, Tg, was observed at 27.6 K. The in-phase component of the ac susceptibility χ′(T) indicated that the SG freezing temperature, Tf, shifted to low temperatures with lowering frequency. Dynamic processes on the frequency dependence of Tf have been analyzed by the slowing-down scaling law, τ∕τ0∝(Tf∕Tg−1)−zv, where the characteristic time τ0 and an exponent zv obtained were about 3.7×10−16s and 9.66, respectively. The microscopic picture characterizing phase separation and competing interactions in the compound were observed by ESR.
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