The FMR spectra of the La_0.67Ca_0.33MnO₃ ferromagnetic film deposited onto y-cut LiNbO₃ substrate have been investigated in wide range of temperature below the Curie point(250K). The strain was mechanically introduced into film using a special holder configuration. The effect of this action results in a shift of resonance field with respect to unstressed state. The reduced change of in-plain resonance field (Δ H_s^|), which is proportional to magnetoelastic stress parameter B^{γ ,2} fits well Callen theory corresponding to single ion crystal field interaction in the sample in a whole ferromagnetic range of temperatures.

Acknowledgements

This work was supported by KBN research grant number 2P03B04924 and in part by European Community program ICA1-CT-2000-70018 (Center of Excellence CELDIS).

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