在MgO和SrTiO3双晶衬底上具有[001]倾斜晶界的BaFe2As2/Fe双层膜
BaFe2As2/Fe bilayers with [001]-tilt grain boundary on MgO and SrTiO3 bicrystal substrates
摘要:
采用Fe缓冲层可以在MgO和SrTiO_3双晶衬底上实现BaFe_2As_2(Ba-122)的共掺杂。然而,在Fe和SrTiO 3之间的额外的尖晶石(即MgAl 2 O 4)缓冲是必要的,因为Fe层的外延的、光滑的表面不能在裸SrTiO 3上生长。这两种类型的双晶薄膜显示出良好的结晶质量。
英文摘要:
Co-doped BaFe2As2 (Ba-122) can be realized on both MgO and SrTiO3 bicrystal substrates with [001]-tilt grain boundary by employing Fe buffer layers. However, an additional spinel (i.e. MgAl2O4) buffer between Fe and SrTiO3 is necessary since an epitaxial, smooth surface of Fe layer can not be grown on bare SrTiO3. Both types of bicrystal films show good crystalline quality.
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