Bi Mn O 3 (010) films (100nm) were grown epitaxially on SrTiO3 (001) and 0.2at.% Nb-doped SrTiO3 (001) substrates using pulsed laser deposition. The microstructure, electrical, and magnetic properties, and indeed the formation of the correct phase, were found to be very sensitive to growth parameters. This optimization has resulted in highly resistive BiMnO3 films and thus enabled room-temperature dielectric measurements: We obtained a resistivity of 5×107Ωcm, and an effective (i.e. thickness dependent) dielectric constant of 1400. These findings pave the way for magnetoelectric measurements and further optimization.
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Eerenstein et al. (2005) studied this question.
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