Abstract
The magnetic properties of La2−2x Sr1+2x Mn2O7 polycrystals (x=0.3–0.4) are studied over a broad temperature range 80–600 K. Quasi-two-dimensional manganites have a complex magnetic structure that undergoes several transitions from one type of magnetic ordering to another. A specific feature of these manganites is a hyperbolic dependence of inverse susceptibility in the transition region from the magnetically ordered to paramagnetic state for T>360 K. This suggests the onset of ferrimagnetism. Electron irradiation to a fluence Φ=1×1018 electrons/cm2 is shown to have no effect on the long-range magnetic order while favoring the formation of paramagnetic polarons and of an inhomogeneous paramagnetic state.
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Translated from Fizika Tverdogo Tela, Vol. 45, No. 8, 2003, pp. 1440–1445.
Original Russian Text Copyright © 2003 by Arbuzova, Naumov, Arbuzov.
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Arbuzova, T.I., Naumov, S.V. & Arbuzov, V.L. Magnetic properties of electron-irradiated quasi-layered manganites La2−2x Sr1+2x Mn2O7 (x=0.3, 0.35, 0.4). Phys. Solid State 45, 1513–1518 (2003). https://doi.org/10.1134/1.1602889
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DOI: https://doi.org/10.1134/1.1602889