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- W2068348055 abstract "ESR spectra are studied in a series of diamagnetically diluted manganites, single crystals of LaGa1−xMnxO3, in a broad range of the Mn ion concentration, . With increase in Mn concentration, a complex multi-line spectrum, typical for low Mn concentrations, evolves to an exchange-narrowed several- or single-line spectrum at x>0.05. The temperature behaviour of the ESR line-width in the range of 80–300 K is found to be very different in the materials with high and intermediate concentration of Mn ions: a slight growth of the line-width is observed in the former case, while a steep line narrowing occurs at x = 0.05 and 0.1 with increase in temperature. Similar temperature dependence of the line-width is also observed for an additional ESR line arising in the non-stoichiometric oxygen-deficient LaMnO3−δ manganite. We explain the experimental data by taking into account the effect of the thermo-activated Jahn–Teller reorientation process on spin dynamics in Mn clusters, and estimate its activation energy as 50–100 meV." @default.
- W2068348055 created "2016-06-24" @default.
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- W2068348055 date "2005-02-05" @default.
- W2068348055 modified "2023-09-25" @default.
- W2068348055 title "Effect of diamagnetic dilution and non-stoichiometry on ESR spectra in manganites" @default.
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- W2068348055 doi "https://doi.org/10.1088/0953-8984/17/7/018" @default.
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