EPR study of La/sub 0.6/Sr/sub 0.2/(Ba,Ca)/sub 0.2/MnO/sub 3/ manganites: adiabatic polaron hopping model

Summary form only given. Internal dynamic and interactions between the spins and lattice in lanthanum manganites are under discussion and can be successfully studied by the electron-paramagnetic resonance. The temperature dependence of EPR line intensity is usually described by the Curie-Weiss law I(T)/spl infin/1/(T-/spl Theta/). That law satisfactory describes the I(T) dependence starting from the Curie-Weiss temperature /spl Theta/ /spl Gt/ T/sub m/ > T/sub c/ only. We deduced the exponential decay for the I(T) dependence and used to fit the experimental data. The EPR study was performed on single phase La/sub 0.6/Sr/sub 0.2/(Ba,Ca)/sub 0.2/MnO/sub 3/ lanthanum manganite powder synthesized by a solid state reaction method.