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T. Matsui,E. Taketani,H. Tanaka,K. Morii,N. Fujimura,T. Ito 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.IV
We have succeeded in preparing single crystalline lms of BaFeO3, which may contain unusual Fe4+ ions, on (100) SrTiO3 substrates by pulsed laser beam deposition. The RHEED patterns for the lms on the (100) substrates apparently show a C4 symmetry, suggesting that the sample had a pseudo-cubic perovskite structure rather than hexagonal unit cell. The (100) epitaxially grown lms were found to be highly insulating, up to the leakage current density lower than 1 A/cm2 at the bias voltage of ..1:5 V. In addition, the lms showed a high value of dielectric constant of " = 59, and relatively small dissipation factor of about 0.07 at 100 kHz. The samples were also revealed to have a remanent magnetization at 300 K.