(139La, 55Mn) NMR and magnetic susceptibility data on microscopic phase separation in La0.9MnO3 single crystal

Abstract

Magnetic susceptibility of the La 0.9 MnO 3 single crystal was measured and its ( 139 La, 55 Mn) NMR spectra were recorded. The data obtained indicate that the areas with an A-type antiferromagnetic order ( T N =140 K) and magnetic moments aligned with the b axis occupy a major part of the sample volume in manganite with a considerable concentration of cationic vacancies; simultaneously, the clusters with a canted magnetic sublattice and ferromagnetic interaction between magnetic moments are formed near the vacancies. Charge distribution in these clusters is materially different from that in the antiferromagnetic areas. Magnetic state and relative concentration of the clusters are discussed.