High quality epitaxial thin films of LaBiMn4/3Co2/3O6 perovskite were fabricated on (001)-oriented SrTiO3 and LaAlO3 substrates by the pulsed laser deposition technique. Magnetization measurements reveal a strong magnetic anisotropy and a ferromagnetic behavior that is in agreement with a super-exchange interaction between Mn4+ and Co2+ ions, which are randomly distributed in the B-site. A distinct anomaly is observed in the dielectric measurements at 130K corresponding to the onset of the magnetic ordering, suggesting a coupling. Above this temperature, the extrinsic Maxwell-Wagner effect is dominating. Theses results are explained using the Raman spectroscopic studies indicating a weak spin-lattice interaction around this magnetic transition.
@article{arxiv.0801.3321,
title = {Ferromagnetism and magneto-dielectric effect in insulating LaBiMn4/3Co2/3O6 thin films},
author = {R. Ranjith and Asish K. Kundu and M. Filippi and B. Kundys and W. Prellier and B. Raveau and J. Laverdiere and M. P. Singh and S. Jandl},
journal= {arXiv preprint arXiv:0801.3321},
year = {2008}
}