Fe/BaTiO3 interface: Band alignment and chemical properties

作者：Zenkevich A^*; Mantovan R; Fanciulli M; Minnekaev M; Matveyev Yu; Lebedinskii Yu; Thiess S; Drube W

来源：Applied Physics Letters, 2011, 99(18): 182905.

DOI：10.1063/1.3657769

Ultrathin BaTiO3/Fe bi-layers were synthesized on MgO(001) and SrTiO3(001) substrates by pulsed laser deposition in a single vacuum cycle. The full electronic band structure at the Fe/BaTiO3 interface has been determined by hard x-ray photoemission spectroscopy measurements. Depending on the growth conditions, the valence and conduction band offsets are found 3.05-3.26 eV and 0.9-1.2 eV, respectively. Interface sensitive conversion electron Mossbauer spectroscopy demonstrates the absence of any magnetically dead layer thus proving that the determined band alignment is related to a sharp Fe/BaTiO3 interface structure down to the atomic scale.

• 出版日期2011-10-31