Magnetic spectroscopy and characterization of La0.65Pb0.35MnO3

Crystalline films of La0.65Pb0.35MnO3 grown on Si (100) substrates by rf sp uttering have been investigated by ferromagnetic resonance and MOKE. The de pendence of the ferromagnetic resonance line parameters on the sample orien tation and temperature is investigated. An expression for the angular depen dence of the resonance field on the orientation of the sample is proposed, based on the assumption that close to the Curie temperature the Zeeman and demagnetizing terms are dominant. MOKE data support this hypothesis. The te mperature dependence of the magnetization at saturation, in relative units, estimated from ferromagnetic resonance agrees with SQUID data. (C) 2000 Am erican Institute of Physics. [S0021-8979(00)67008-1].