Hyperfine interactions at the lanthanum ion nucleus in LaMnO3

The influence of the orbital and magnetic structures on the hyperfine interaction of the nuclear moment of the lanthanum ions with the magnetic subsystem of manganese ions in LaMnO3 is investigated. The temperature dependence of the nuclear magnetic resonance spectrum in a polycrystalline sample in an external magnetic field is constructed. It is shown that the governing role is played by the anisotropic hyperfine interaction due to the polarization of the outer p-shell electrons of lanthanum. The proposed model can give a correct description of the experimental data. (c) 2007 American Institute of Physics.