Electron spin resonance and AC susceptibility studies on La_(0.9)Pb_(0.1)MnO_3 single crystals

摘要

Phase separation has been recognized as important properties of manganite to create colossal magnetoresistance (CMR). Frequency dependence of AC susceptibility and electron spin resonance (ESR) studies confirm the phase separated glassy magnetism in the La_(0.9)Pb_(0.1)MnO_3 crystals. ESR spectra exhibit a gradual narrowing of the asymmetric FMR signals upon increasing the temperature and approaching the Curie temperature (T_C). The temperature dependence of line width (ΔH_(pp)), g-factor, double integrated (I) intensity of the resonance signals and frequency dependence peak temperatures are discussed in this paper to explain inhomogeneity in the La_(0.9)Pb_(0.1)MnO_3 single crystals.