Epitaxial growth of bcc–FexCo100-x thin films on MgO(1 1 0) single-crystal substrates
Epitaxial growth of bcc–FexCo100-x thin films on MgO(1 1 0) single-crystal substrates
复制标题
MgO(1 1 0)单晶衬底上bcc–FexCo100-x薄膜的外延生长
DOI：
10.1016/j.jmmm.2010.01.012
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发表时间：
2010
影响因子：
2.7
通讯作者：
M. Futamoto
中科院分区：
文献类型：
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作者：
M. Ohtake;T. Nishiyama;Kouhei Shikada;F. Kirino;M. Futamoto
采用超高真空分子束外延技术，在300°C加热的MgO（110）单晶衬底上制备了FexCo 100-x（x=100，65，50at%）外延薄膜。讨论了薄膜的结构和生长机理。具有bcc结构的FeCo（211）薄膜在MgO（110）衬底上外延生长，在所有成分下，薄膜的取向围绕薄膜法线旋转180°。FexCo 100-x薄膜生长遵循Volmer Weber模式。X射线衍射分析表明，薄膜的面外和面内晶格间距与体相FexCo 100-x晶体的晶格间距基本一致，误差小于± 0.4%，表明薄膜中的应变很小。高分辨截面透射电子显微镜分析表明，在Fe 50 Co 50/MgO界面沿着MgO[11 <$0]方向优先引入周期性错配位错。这种周期性位错的存在降低了FeCo/MgO界面沿沿着MgO[11 0]方向存在的约-17%的大晶格失配。
FexCo100–x(x=100, 65, 50at%) epitaxial thin films were prepared on MgO(110) single-crystal substrates heated at 300°C by ultra-high vacuum molecular beam epitaxy. The film structure and the growth mechanism are discussed. FeCo(211) films with bcc structure grow epitaxially on MgO(110) substrates with two types of variants whose orientations are rotated around the film normal by 180° each other for all compositions. FexCo100–xfilm growth follows the Volmer Weber mode. X-ray diffraction analysis indicates the out-of-plane and the in-plane lattice spacings are in agreement with the values of respective bulk FexCo100–xcrystals with very small errors less than ±0.4%, suggesting the strains in the films are very small. High-resolution cross-sectional transmission electron microscopy shows that periodical misfit dislocations are preferentially introduced in the film at the Fe50Co50/MgO interface along the MgO[11¯0] direction. The presence of such periodical dislocations decreases the large lattice mismatch of about −17% existing at the FeCo/MgO interface along the MgO[11¯0] direction.
Ag底层对Fe薄膜微观结构和磁性能的影响
DOI：
--
发表时间：
2007
期刊：
IEICE Transactions on Electronics (採録)
影响因子：
--
作者：
K.Mimura;M.Arita;K.Wakita;N.Mamedov;他5人;T.Handa
通讯作者：
T.Handa